I upgraded from 32 GB 3200 MHz to 64 GB 3600 Mhz.
I can see improvement in overall PC functions such as speed of display.
FS2020 is faster. I fly with graphics settings on 4K Ultra with Raster Scaling at 100 and the two LODs at 200.
i9-9900K, Z390 MB and GTX 1660 TI GPU.
Buy the memory. If you don’t see any advantage, return it.