I also maintain my collections of vinyl (and CDs). Mine is more modest, maybe a third of your collection. I still spin these once in awhile... but generally I listen to streaming on YouTube, Google Music, and Pandora. But it's nice to break out the LPs every so often.
I'm on my second turntable since 1975: another B&O purchased around 1994 (this one lacks the rosewood base but has a tangential arm). Yes, not quite audiophile but I like that it turns itself off, and the tracking force/mass has no comparison. I have been tempted to upgrade it.
It's funny how the golden-eared listeners (mostly jazz and classical) hopped on CDs first. Then later the golden-ears reverted back to a much higher level of vinyl. Myself, I just can't see $20,000 turntables (and even more)...then you need the cartridge on top of that. Or the cables that cost like $100 a foot. For my original 1975 Klipsch Heresy II speakers I just use... well, I was using lamp cord but "recently" I did get some speaker wire with oxygen-free copper.
I agree that within a generation or so (the 25 years) there will be very little vinyl. It will likely be the province of super rich eccentrics. (as those $50,000 turntables are now).
Keep up the good "fight"! ๐