I always thought it would be cool to have a PC that you just turn on and in 200 milliseconds, you're at a Python REPL or something. Like the old Commodore 64 that booted you right to BASIC from ROM. No POST, no beep, no detecting this and initializing that. No fucking splash screen. Just power switch on and BAM, you're at the prompt.
According to a Google search, a typical C64 was on in 3 seconds. Maybe I've got rose colored glasses about how long it took, because my recollection was that it was basically instant.
Hell, my monitor can't even turn on in 3 seconds. You hit the power button and it gets busy doing... something... who knows what... not turning on, that's for sure.