You seem to be very knowledgeable about what developers think and do, so I assume you are one, or are deeply involved in some way. Awesome.
I have FS9, FSX, X-Plane and MSFS2020 installed. I spend time with all of them, and they all have something to offer. Not everyone plays flying games the same way or for the same reasons. Not everyone is focused on the visuals. Flying the CLS 742 between KJFK and EGLL in FS9 is a pretty good experience, didnt notice any wonky behavior from my autopilot either. Similar bug free experiences can be had in XP11, and FSX also. You can't seriously expect everyone to just drop what works and run off chasing the new shiny. I expect MSFS 2020 to eventually crush the competition, and sadly most developers will start developing for them exclusively, it is progress, like it or not.
I value an enjoyable flying experience over everything else. Realism isn't only in the visuals. Systems and functionality immerse me more than buildings and trees. MSFS is fantastic for low and slow. When they iron out the issues with default aircraft, and we get more airliners in game, it will be great.
I for one would like to thank all the people who have given their time and hard work in creating aircraft, scenery, and other things as freeware. I would never refer to it as crap. Not all of us can afford all the pricey perfect addons that the more discerning virtual pilots swear by.
And I honestly have never felt like a badass for using old stuff. That doesn't even make sense. I use old stuff because i get entertainment value from it. Aside from those that are real world pilots, the rest of us are playing pretend. It's ok, it doesnt make you not a badass that you pretend. It's a hobby, enjoy. I drive a real truck, and the oldest truck simulator can be as realistic as the newest, it's all what you want from it.
People still use FS2002, Viva 2K2!!