I have a bunch of old AV equipment that serves well, but ...
The Denon amp needs a little TLC, perhaps. But recapping and restoring in general is likely to cost many hundreds of $$, perhaps approaching a $K. OTOH, anything new that's comparable seems to be close to $2K. So "make or buy" is a point. Is modern gear *that much better* that I should pay, say, 30-40% more to replace, knowing that the modern gear probably will not last 30 years (more than I'll be around, of course), like the Denon has, and certainly will not be repairable, or usable without an app running through somebody else's server.
Then there's the living room TV that I won't get into right now...