So what? I don't understand the whine on this one. If you don't have to reboot mid song it's not a problem at all. A valve amp takes longer to warm up properly, so you do same, turn it on while you wait plug in your leads, get your mike stand set, drink beer, argue about set list, insult drummer and bass player, drink more beer etc ....
Just to be precise. I have given the times of boot, without whining.