Second, an hour was just an example. Most of my exposures are not longer than 4 or 8 minutes.
Third, I'm happy that you are fine with external controllers. But I'm not. I find them crude and unnecessary. I'm doing a lot of HDRs and I don't understand why I cannot simply preprogram my camera with sequence of shots and execute it without any gadgets and limitations. Say, there's this nonsensical limit for 1 minute or 30 seconds everyone seems to defend for some strange reason, (is there some sort of Stockholm syndrome at work?), at least the manufacturer could provide a better bracketing setting to compensate for it. It's not like it's rocket science. An intern could write the firmware in a few days. I cannot even patch the camera without voiding the warranty. I know they are always workarounds, but why make things complicated, when they could be simple.