Don't forget that "hibernating" a laptop with a lot of RAM might take long enough to run down your battery.

I think Hibernation has been impractical since 2013 or so.

It's basically impossible for hibernating a laptop to take more than about 5-6 minutes unless you deliberately configured it with insanely imbalanced components, ie. more RAM than mainstream laptop hardware platforms support, and the slowest storage you can find.

Could still be a problem if you are expecting hibernation to save you at 1% battery remaining.

Especially when 1% is displayed as 5% or 10%.

The monster laptop consumes more power because it has all of that RAM, the battery is sized to "not cause a crisis on an airplane if it burns up" not to power a machine of that type, particularly after a year of battery aging.

I have an Alienware that runs rings around any Mac and can do ML dev work with NVIDIA if it is on the plug but on battery I count on it to keep running as I move it to another plug and for the battery to maintain sleep mode for 48 hrs or so.

SSDs have also been getting pretty fast, though.

I don't have lots of RAM (but rather on the low side for present day), but hibernation takes maybe 15 seconds on a SATA SSD.

Hibernation was definitely a lot slower 10 years ago on a desktop with less RAM and a slow spinning disk.

Really? Hibernate has never taken more than 30 seconds for me even on a mediocre laptop with an HDD.

My bog-standard PCIe laptop SSD writes at 3GB/s, so anything over 10s seems like it is an implementation problem not a hardware limitation.

Strange. I never reboot, only use hibernation. I've been doing that for years and never had any problem.

You might want to share your setup then.

My HP Pavillon with windows hibernates reliable today, my very old netbook acer with Ubuntu/LXDE did so, too (but that was years ago).

Nowdays I gave up with linux laptops to even enable it, as it is quite complicated to set it up when you dual boot and use encryption. And after I did set it up, it failed over 50% of times on various devices so I did not bother anymore.

Same, the main instabilities come when I go out of hibernation with changed hardware, ie. haven't plugged back the mouse or changed the display from desk to meeting room

Also availability of drivers in Windows doesn't necessarily mean everything is comfy, certain manufacturers/BIOS vendors were notorious for not implementing ACPI correctly leading to several such issues; I hope with UEFI things have improved.