A key part is not only about saving particular documents but about keeping the whole state of all apps as-is, which is not compatible with "shut down my PCs reg

A key part is not only about saving particular documents but about keeping the whole state of all apps as-is, which is not compatible with "shut down my PCs regularly". My workflow involves closing up the laptop, carrying it elsewhere (while it sleeps - it has to survive being in a bag so not heating up), reopening with all the exact state it had, potentially many times each day. Then at the end of computer-day closing it (to sleep mode), and starting the next morning exactly where I left off - not from a clean after-shutdown state. Even for an unavoidable reboot (e.g. install of OS version update) I'd expect most of that state to be restored e.g. OS X and compatible apps restoring most the open apps and documents as they were - sadly it doesn't work as well as it should, so sleep is strongly preferable to anything involving a reboot. A full shutdown is an extraordinary event that's done when placing an unused system in long-term storage or when giving it to someone else, because all other daily usage (and short breaks e.g. weekends, not just "temporary moments when I'm away from my PC.") is better suited by a sleep/hibernate mode, at least if that works properly. TL;DR - a need to shutdown regularly is a fundamental design flaw, not a problem between keyboard and chair.