How many systems do you have?

main. bedroom, downstairs living area, workshop, bluetooth front veranda

One.

If I had several systems, I would still just be listening to only one of them only, the better of them.

I work for a living, so I don’t have too much time for listening. I try to make time most weeknights, and weekends, and when I do, I would most certainly only be listening to my best system if I had several 

Listen to 1 primarily, but 2 others occasionally (HT, garage).

Have the gear for another 2. Need. To. Sell.

on this continent ?

I have two - but it seems that the "secondary" system has become "primary" - - and has been for some years now.