There is a Live ISO for Mageia too to download.
Perhaps not lightweight though but rather a full distribution 4GB USB.
It appears that the diminutive Linux distribution Slax is not dead. It's been a while, but version 11.2 has finally popped out. By "a while" we mean more than two years, according to the maintainer. However, it's a welcome update, even if some of its fans might have moved on to alternatives during its hiatus. Slax is an …
Oh, good... CAN IT BOOT FROM A NVMe disk yet?!? Cause ever since I moved my previously WORKING setup (which still boots W7, W10 and Mint perfectly fine) the Slax boot option is the only one that still chokes AFTER managing to actually take control. No idea what its problem is, and it's not like there's any kind of help available.
Please do excuse my late reply - sorting this out was nowhere near the top of my list of priorities. However, new developments suggest the problem (as usual) wasn't on my end - there is aparently a closed bug on the Slax bug tracker attributing this problem to, uh, "blkid" simply not noticing nvme partitions (until pointed out to it by explicitly running it with those as arguments (!!!)) in spite of the rest of the distro/kernel having zero problems with nvme on any level. It's as nice a demonstration of "only use any Linux variant if you LIKE having problems all the time" as I've ever needed or have seen.