My M1 needs a new battery, other than that it works fine.
 
My blackface ADAT is still in my rack and still gets used (although not for its original purpose).

My Yamaha SW1000XG won't run in anything. Yamaha is the king of doorstops.

bapu
I'm old and I still work.
 
I'm grateful for every day that it happens too.

 
you don't look old and you love your job - 

2:43AM

JonD
Way too many over-65 Americans, who can't retire when they originally planned to. 

 
Ba dum tss!

Always wondered how to spell that. Now I know. The things you learn.

I've got a lot of old gear that still works. Most of it is Roland or Yamaha. ( no doorstops here) 
Some I still use, some just looks good with all the lights out in the studio and powered up. 
A lot of it I tried to sell and no one wanted it at the time. So I keep it out of spite. 
I don't know how many times I tried to get rid of my Roland GR50 and now I'm using it again and having a blast thanks to the use of a Godin guitar. 
My Yamaha 01v is bulky and gets stashed away a lot, but all you get for them is around $200. So I keep it and still find a use when I record a band. 
Somedays I wish I had kept every piece of gear I ever owned! I'd certainly need to double the size of my music room/studio. Especially old guitars, basses and amps. 
 

I weep for the "old" stuff I have disposed of in the past.  My new rule is:  if there is any space for storage, keep it!

Just about everything I have with the name Asus on it still works.  At one time the M2N series could only run 1 Dual Core AMD and a bios update could now run AMD Quads. 

I have a Boss DS330 synth module that is bumping against 20+years old and it is still working as well as when I bought it.
 
There is also the ~40 year old Polymoog that sorta works. I keep it for sentimental reason. Although, it is more of a monolith than a door stop.

My ORIGINAL version of East West Symphonic Orchestra Silver
Kompakt Edition.   Still running in Windows 10...just can't kill it