Upgrade to 32gb

That extra RAM is going to help you when it comes to stutters. I run 32 GB DDR4 @ 3200 MHz and in MSFS, P3D, XP, DCS on an SSD it helps, I have little to none. Can’t say the same when I used to run 16 GB DDR4 @ 2400 MHz (though back then running on an HDD didn’t help matters).