It's so silly to think that just because a vintage receiver hasn't been completely recapped and torn down that it is inferior to one that has. If you get them serviced by a shop that knows what they are doing and gets everything back into spec you are just as well sometimes even better off then if you had paid for a full recap. Most of the caps aren't still in production so they have to get something close which isn't always so close!
There are some caps inside no longer obtainable - my guy expressed this. Also, the one or two he did replace went well. And the amp returned very good specs on the bench; plays/sounds like it should, was his opinion. He's an old-timer and been working on '70's amps since, well... the '70's.
In keeping the amp, just thought I'd seek to get baby rejuvenated. There could come a time where the end-of-life appears for a cap and maybe I'll wish I had done something. Like a caring parent.