I believe you've done alot of research beforehand. You prob know more than me. Heres what I though.
yeaa, isnt worth going for a cashless ssd. Their really bad at random read write. Quality ssds now goes for cheap on the market. For example the crucial mx500, which is a TLC ssd.
QLC ssd are common on m.2 2230 ssds, or super high compacity ssds like the one linus just reviewed.
QLC ssd are slow while write, fast while read. Prob good for game library.
TLC, most ssd has it. fast read, fast write. though goes for a bit more if its a m.2 drive.