Art Waring
nevermind...
This reminds me of that old argument around scaling DC's.The trouble with when the risk & difficulty drop past a certain point is that roll or not you have a situation where the consequences can't matter.
You can scale DC's (Difficulty Class), but then players never feel like they have gotten better at anything because the difficulty keeps scaling with their power level treadmill.
Or, you can lock in DC's at fixed intervals, and once players get good enough, nothing presents a challenge.
This has been a problem for a very long time, at least since 3e, I don't have a magic solution, all I know I that at my table I run it as a fixed DC table, but I also cap the game at lower levels akin to E6 games so players never get to ridiculous numbers.
YMMV.