Originally Posted by WhyFi

Cuts are really only a problem if they're big enough to compromise the casing (visual bulging) or if they're big enough and you ride through enough debris that it has a too-easy time of re-puncturing the tube. Some people like to fill in these kinds of cuts with shoe goo or the like. If the tire still has a decent amount of tread life left, I'd probably look at sealing those cuts, somehow.

Or, if you're just emotionally done with them, you could move on to something with better protection, if you're not ready for tubeless. Bah Humbug likes his Michelins, I think - I'm sure he'd be happy to advise.