We are going to see lots of dobs as future classics.
Scopes like Obsession, Starmaster, Starsplitter, to name a few.
And they will be easy to keep running, just buy a sheet of plywood, trace the old
parts, and you've got a brand new telescope !
I have two Starsplitters, the 13.1 inch was built around 2001, the 22 inch in 2003. They're still virtually new and with care, I don't see them needing any significant repairs for a long time. My 12.5 inch and 16 inch are truss types made with optics over 25 years old. More shocking is that my made in Taiwan 10 inch F/5 turns 20 this year, in 5 years it'll be a classic.
When I joined Cloudy Nights in 2004, only the very oldest SCTs qualified as classics and there was some debate/discussion as to whether such a modern designed could truly be a classic. I certainly had a difficult time accepting that.. now, 18 years later, it seems like a non issue.
Today, I think that same front line of acceptance is Dobsonians and GOTO mounts.
As a Dob Guy, I still have the same difficulty accepting them as classics that I had with the SCT, "these aren't classics, classics are old and obsolete. And Dobs they don't look like a classic scope."
But older Dobs, they have much in common with the older classics, simplicity. There's nothing simpler than a Dob.. my reluctance to accept Dobs probably says more about me, fixed in time.
GOTO, that's hard to accept. But unlike Dobsonian whose simplicity means they can be live very long lives, GOTO mounts face serious obsolescence issues. A Dob doesn't face customer support, parts and repair issues. Some GOTO mounts will be long lived, the A-P mounts for example, but most probably probably will end up as junk, an electronic or mechanical failure having been their Waterloo.
I often see in other forums when the transient nature of GOTO mounts is brought up, things like, "If it lasts 10 years, that's more than enough for me, I'll be wanting a new mount before that anyway...