Making skill checks more PBTA

One thing I loved when reading Dungeon World was how all the moves fall into the same basic pattern:10+ (on 2d6 plus modifiers) means clean success7-9 means success, but with a cost or limitation6 or less means failure and the DM moves the story alongIt's an easy change from pass/fail and it runs right through all "Powered by the Apocalypse" games.  Note how there's no DC. I like this. So often my players roll skill checks and announce the result before I decide the DC that I end up just eyeballing it - so why not get rid of it? This is all about stakes and not about difficulty.So for my beloved Stars Without Number it's an easy enough change for me to want to start using it, I guess it is for any other 2d6 system, but can we apply it to D&D?  Mathematically (according to AnyDice and some probability calculations) this should map to 18+, 9-17, and 8 or less which is actually not too clunky!However, 2d6 and 1d20 give totally different distribution shapes, so any modifiers are going to swing thing

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