My reason I see a lot of people send a lot on the top of the range GPU and CPUs and is there any need I have a modest system that plays MSFS and any thing very well here is my spec -
CPU Intel i74790K @4GHZ
M/B Asus Z97 Pro gamer
GPU Asus gtx 1070 8gb
Monitor 29 inch LG 2560 x 1080
Ram DDR3 16GB G Skill Trident
MSFS is installed on it own SSD Samsung 500gb
Windows on a Samung SSD 250gb
And I have a Samsung SSD 1TB for addons and other stuff.
A total of 3 drives and keep them clean of rubbish you do not use and keep Windows clean.
Here are some pics over London with Photogrammetry enabled
Note the FPS upper left corner, my thoughts keep MSFS on it own SSD drive and nothing else on it.