High quality gear is high quality gear, no matter when it was built.
For me Vintage gear is where it's at. I like the build quality, the looks, and most importantly how it sounds. I like analog music, vintage will give you that, without all the add ons of today's gear.
For me, when I see new gear, I have to turn the knobs, or switches. Unless it is very high end gear, all the knobs, and switches feel cheap. Most are not even real, all digital on the back end. The stuff that does feel good, is so far out of my price range.
Right now, my main 2ch is all vintage, sans a streamer (need something from this century) & my TT. The TT is only new, as it's been tough to get the vintage piece I've been looking for. The sound is warm, analog, clean, open, with 200 old school watts, plenty of power to drive my vintage Forte II's.
As far as reliability goes, almost nothing is reliable anymore. My HT system is all new, my expensive Marantz receiver bit the dust 2 mo ago, out of warranty, no one wants to work on it. Forced me to buy a brand new Marantz receiver. With my vintage gear, once I year, I take it all apart, blow out anything inside, clean all the pots & switches. Look for any swelling caps, button it all back up. I do believe my vintage gear will outlast all my new gear. Best of all the vintage stuff can all be fixed.