Since it doesn't look like it's been asked, but will there be support for SFX-L PSUs as well? Would allow more higher wattage choices too.
If we can, sure but not high priority.
There are 1000W and 1200W SFX coming, SFX-L won’t have these, so it’s not going to win in either power, efficiency or noise, so it’s basically an inferior choice in the long term.