If I'm making for me, then I would expect a significant impact - one directly tied to the impact on my own time for stargazing.
Stimulation of more mirror making?... Only if said mirror making was for customers. More "carp" in the skies => less time at the eyepiece => more time with grit and polish. If there are no customers, then the carp would bum me out, yielding very little desire/drive to grind my own optics. "Fix" and "spiff up" existing scopes?... Perhaps, but - again - that would likely be for others, and not myself.
My stargazing time, last summer (2020), was lousy (Colorado). I recall one decent night of Jovian views through a 70mm achromat I'd just finished fixing/collimating. Beyond that night?... Not much else... a brief view of a Jovian shadow transit in my Stellarvue (before my wife reminded me how late it was).
Interesting question, though. Thanks for posting.