What made you put together your first 2nd system?

Three systems, one in each of the places in my house where I spend a good deal of time, living room, office and garage workshop. All of them are tied together by WiFi so that I can move from place to place without any interruption in what's playing.

I spent a lot of time at a friend’s house and the only music available was from their flat screen’s speaker via cable box.   They thought it was fine. Drove me crazy.  I brought over an extra Cary amp, Marantz DAC, N802s and Cardas cables. Loaded Roon and Tidal on their PC and I could not be happier.

Recently in another thread, oldhvymec gave me the idea to keep my extra cables broken-in on a second system. Well I have one, it is just at a friend’s house.  

I think I have a problem!  To many years collecting and hoarding, I have 3 2nd systems my main system in the basement for serious listening, a system on the main floor for every day listening, a system for the office, and a system at the cabin. I need help.

I've just fired up my 23rd second system. Or as I like to call it, the laptop.

Basement surround system, shop 5 speaker system, garage 4 speaker system, shed (backyard) 8 speaker system, office 5 speaker system, bedroom 3 speaker system and finally both stereo and surround systems in the A/V room.
31 years in the same place will do that.
No help needed