I'm with you on that. I'm very selective what I leave on. Low power solid state small signal gear: Preamp (solid state), yes. Active crossover, yes. DtoA yes. Power amps and anything with tubes (8-channel power amp, CD transport, T2, BH original), no. If I'm going to do any serious listening, I power up whatever the heat generators are and have a coffee and sandwich - and everything is on song by then.
But even with a solid state electrostatic amp, I definitely would not leave it switched on - parts are stressed both in temperature and voltage - and I would not want to leave a set of expensive electrostatic phones with bias permanently applied. Made that mistake with a pair of ML Aerius speakers and the film eventually disconnected itself (later ML's only trigger bias when music was detected, so they knew they had a problem).