If you go into developer mode in FS2020 you can turn on the ugly fps and memory usage display from the menu that goes across the top of the screen.
When I doubled the RAM, the discreet GPU began using a lot more of the shared memory. It is now using about 4 GB most the time and the CPU is now using about 8 GB. Both were using less when I only had 16 GBs installed.
I purchased the original Garmin GPS 95 AVD (aviation database) handheld aviation GPS when they first came out in 1993. The next year for an additional $150 we were able to update to to a GPS 95 XL through a firmware update. It became a “moving map” unit. With the “moving map” it was great for avoiding controlled airspace. Even though the display was very small and didn't even have gray scale graphics, we used it to thread through some pretty tricky airspace. It was a godsend for just $1,300 in 1993 plus an additional $150 in 1994. Of course, we had to purchase new database files every six months; I don't remember what they cost.
https://static.garmincdn.com/pumac/GPS95XL_PilotsGuide.pdf
These days you can get free or almost free software that is much better for your phone, tablet, or iPad.
But I am with you on the instrumentation. My home-built ultralight doesn't even have an airspeed indicator. When hang gliding we usually used a variometer (audible vertical speed indicator) to help find lift. They produce happy bleeping when you are going up and a depressing blooping when you are going down.
I don’t have very many hours total but did manage to get the glider add-on and enable the variometer tone in various flight simulators.