I can never remember–off? on? off and then on? Big? Small? Just what?
Thanks.
Since I switched off the rolling cache, I have much less stutters, especially when flying over photogrammetry areas. Also less trouble after wolrd updates etc.
Ymmv though.
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Okay, thanks.
Do not forget to clear the rolling cache before you start updating
Off. Been working well for me. (But I do have 128Gb of RAM fwiw).
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Probably depends on how much ram you have. I have 32g rolling cache is off.
Never seemed to make any difference to me on any version. If you’re worried about it, just turn it off – worst case is you spend more bytes on your internet bandwidth cap while flying. 
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I usually turned off Photogrammetry and no caching anyway. So probably won’t make a difference for me.
Off, works best for me.
I fear the whole rolling cache issue is just a placebo now. Honestly, I’ve never noticed any perceivable difference between having it on and switching it off. People are actively looking for differences when there likely are none. If you look hard enough for these ‘differences’, you’ll invariably find them.
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You may not have noticed any difference but others have.
For me there’s a huge improvement to stuttering with it off. Easily reproducible. With a powerful machine that includes 128gb and a 4090.
I’m totally with you on the placebo effect of various tweaks (for many applications). But in this case, no. It’s a real thing.
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I have a 15GB Rolling Cache mapped to a RAM drive at logon that gets copied to a disk image when I shut down the computer. The disk image is copied back to the RAM drive at logon, so no data is lost.
Why do I keep it, when the overwhelming opinion is that it’s useless?
RAM is so much faster than either disk I/O or network I/O. Having terrain swap in and out of a RAM cache just make sense to me. I would turn it off if the cache was mapped to a physical drive, because I have a fast enough internet connection. I use WiFi and get around 300 Mb/s up and down to internet servers. That’s fast, but it’s not in the same ballpark as a RAM drive.
I believe I do notice a difference when I fly in a new area and then fly it multiple times (which I do.)
Perceptual cloudiness? Maybe. But I believe in the science of data transfer rates.
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My Univalve saucer allows me to be here, there and anywhere in a matter of seconds…
…long before the Cache has even started Rolling. 
Many users, including me, get significant stutters when the rolling cache is full.
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No discernable difference for me, on or off. So I’ve deleted it.
One thing I’ve heard is that the sim uses the cache (or some of it) even if you turn it off, so you should delete it. That’s only hearsay and I’ve no proof that it’s true.
OFF, for g*d sake! =)
If a HUGE consensus says leave rolling cache OFF, what is the purpose of having a Rolling Cache in the first place. If it is suppose to “enhance” the operation of the MSFS and does not, then are the MSFS programmers working to FIX it ?
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What is the purpose of the Rolling Cache?
As much as I respect the knowledge and abilities of the members here, I suspect that a big reason some people disable it is, “Because others said to” and not because they understand its purpose.
Does it function as it should? I don’t know. I know that I choose to keep mine enabled on a RAM drive, and it seems to be beneficial. YMMV.
To avoid re-downloading data that was previously downloaded, thus reducing your internet bandwidth usage (which might save you money, or might save Microsoft money, or both, or neither). It presumably “works” but most people don’t seem to care about that and so don’t bother to measure it, caring only about performance and whether the disk access has an affect on frame render time consistency (some say it does, some say it doesn’t).
I have 64GB of RAM so having read your post I decided to give a RAM drive a try. I have just installed ImDisk and set up a 16GB drive allocated to rolling cache.
Result:
My performance test area is always London with the ORBX London City Pack as this is a known FPS killer.
I am getting faster frame rates. Before 20FPS and below, after above 30FPS.
I am getting faster photogrammetry loading. There is still some scenery popping, but much less and much faster, no stutters.
My system was top of the range when I bought it last year just before NVidia released the 4000 series GPUs. I have an ultra wide 49" curved monitor with G-SYNC enabled running at max full screen resolution, uncapped frame rate. MSFS settings on Ultra. DLSS and DX12. I also run a bunch of other FPS intensive addons at the same time.
Fibre optic internet connection is being laid in my street at the moment, but until it is connected to my house I only have an 80Mb/s hybrid DSL/LTE service which only gives around 40Mb/s on average.