Off the top of my head, here are some I haven’t seen mentioned yet:

I’ve only flipped through the rules, but I believe Call of Cthulhu (and by extension, it’s derivatives) has degrees of success/failure.

Mutants and Masterminds has it too.

Systems with a single d6 resolution mechanic tend to have it as well (like Freeform Universal and Neon City Overdrive.)

Some systems, like Black Sword Hack don’t really have degrees of success/failure, but a near success can be ruled a “yes, but” at the GM’s discretion.

I suppose I see it as a flaw because it generally goes underutilized. It’s a cool mechanic, but only 1/3rd of it gets any regular use.

Thanks, you make some good points.

Upon reflection, I do tend to approach the game with more combat than it’s designed for as my players love combat. And the general lack of dex and wil/cha attacks from sample foes in the various games just exacerbates the issue for me.

I like the Wil damage from casting spells in Mausritter. (If I remember correctly, Into the Dungeon: Revived does it as well.) It makes casting more high-stakes, which is something I love in a game. To me, magic should be scary, even to the one weilding it.