I have one main system and also 2 1/2 other systems consisting mostly of gear that used to be in my main system.
The main system has been static for several years and I see no prospect of needing to make any changes. Wilson Maxx2, CJ Premier 14 pre, CJ Premier 11a power, VPI TNT V/SME V/ Koetsu Urushi/Vendetta SCP2-D phono, and digital streams to a Moon 280D DAC