I have mostly Solid State and leave it on 24/7/365 as well. My Unison Research Unico SE hybrid tube integrated gets better with each hour it is on if I shut it down due to travel or inclement weather.
How long it take before your system/amps sound
...the best. My system sounds the best after 12 hours of playing. I didn't realize this until I inadvertently left my system on overnight. I was surprised how much better it sounded compared having the system on for an hour or two. I have tube DAC and amps, which probably are the reason for long warm up. His really surprised me.