There is a certain UK amp brand which all but took over for a while (Naim) which reviewers egged on by the maker, used to be recommended to be left on 24/7. Some eejits used to say that these amps took WEEKS to fully 'warm up' after a period switched off. Downside was these 24/7 amps drifted off internally (offsets and so on) after a while and the sound went off together with thermal changes under use as distortion rose and rose until they were re-set inside and certain parts replaced, generating a second income stream as basically all the models up to the 2000 cosmetic change needed it and probably still do twenty odd years later. I could say a hell of a lot more, knowing what I do now about the circuit used, but best let sleeping (backwards) capacitors lie I think - current production seems different and more stable but not sure how different the circuit and components used are. In practice, these amps only needed 3/4 hour to 'sound' best when new and I could never detect a change after this time (uber-fans would say my ears or system weren't resolving enough!).
Back in the late 60's to early 70's, a mag contributor tested a Quad 33/303 (remember those) and found it took them fifteen minutes to fully settle. My HH pro MOS-FET amp needs around the same and you can measure the offsets and bias voltages slowly change and then more or less settle to a nominal figure as the amp's heat-sinks warm up and stabilise.
So - My suggestion is that if you come home from work and want to have a listening session with some favourite music, turn the gear on maybe playing the radio or something quietly and then go and change, have a shower or whatever, or cook some food and then come to the system half an hour or so later, by which time you and the gear should have reached a nice mutual equilibrium ready for the music to do its thing