Solid state preamp warm up time?

I personally don't trust leaving any audio preamp or amp on all the time.If the company that build it says to do so,I'd still pass on the idea.Every piece of audio gear I've listened to(tube or solid state)seems to reach its full potential in a half an hour or so.I imagine you will get a lot of opinions,but for safety reasons I don't like the idea.A lot of class ab amps get fairly warm,depending on the bias and design.Pre-heating sounds like a good option. Things do fail.Just my 2 cents.

If it is fused properly I'd leave it on 24/7- more so than the amp, but the amp possibly too.

Pass recommends 24 HR warm up on their preamps. They don't even have an off on switch and are designed fir continuous powerup. You mileage may vary but I have always found solid state to be best left on 24/7

I find my H-Cat ss amp needs about 30 minutes to reach its peak.

I used to leave my preamp on 24/7 unless it was tubed. My amp I left it on for the weekend if I knew I would be listening. I will say I think an amp or preamp needs 24 hrs to warm up and sound its best.