Today I pulled the plug on my internet connection to see what would happen with all the rolling and manual cache. I flew the same flight as I fly everyday although I was flying 250K at 3000 instead of the usual 300K at FL100 or FL 150.
IMHO (with Project Coastline scenery) It looked as good or better than with the streaming scenery. I could hardly tell where the PC scenery stopped (Ventimiglia) and the default took over. Tons of good looking Autogen. Of course I have Nice, Cannes and St Tropez airports installed.
Even landing in St Tropez ( I run daily service there lol) it looked better than I remember with the streaming running.
I’ll have to fly it again with the streaming but as far as I’m concerned, the streaming is marginal benefit which makes the cache (if it does anything at all) the same marginal benefit.