When someone is thinking of getting rid of the older bikes and buying "something I don't need to work on" they need to consider their own personal "spannering vs riding" enjoyment ratio.
To me, that ratio would be 50:50 riding to spannering, but then I'm lucky in that I have a reasonably-sized and well-equipped workshop, so I can spend time happily getting oily in the shed when it's not a time for riding, plus I have other bikes to ride.
Also to paraphrase someone from the past, it's not the destination but the journey. Sure, some nice new bike would be pretty much guaranteed to get you where you're going, but what a boring characterless journey it would be, and when you got there there'd be no-one who wanted to indulge in the old "that's a nice bike, my dad had one of those...etc etc" and that interaction is always enjoyable too.
Still, good job we're all individuals with our own views though.