How many systems do you have?

living room setup; bedroom setup; plus damaged partially working gear I've not had the heart to throw away in the garage that provides either radio or through an inexpensive cable, streaming from my phone 

3, with 1 being for AV.

Four.

Vintage nearly SOA.     80s to 00s

Vintage vintage SOA.  70s to 80s.  Features AR SP10 and Krell KSA50.

Crummy cheap Japanese home theatre.  Why pay more to watch films?

Desktop, no improvements.  Thinking of adding an op-amp and small bookshelf speakers - anyone got any original Goodmans Maxims?

It was 1 for the past 30 years but as of a few months ago the number is now 2.  Like many I had old stuff in the attic so I set up a 2nd system in the spare bedroom.  I tried listening some afterwards but it is so far beneath my main system I never touch it now.  My daughter is 9 so I am gonna  leave it set up and see if she gains interest.  For now, she has her Echo Show in her bedroom and Alexa plays whatever she wants without having to power anything on lol.  What I have always wished I had but don't have the space is a different type of high-end system.  My main system is Audio Research with Wilson speakers.  I would love a SET tube amp and some Klipsch....at least I think I would! : )

4 in my study, 1 downstairs in main house.  3 in lake house. Then outside speakers, whole house stuff, etc.