[dkmar]

Dynamic UTIs in macOS started to cause problems for me when I upgraded to Catalina.

Setting defaults for 'Open with' on these file types seems pointless as I'm forced to do it once per each dynamic UTI (as far as I can tell).

It's also annoying that quicklook (extensions) started playing dumb with them — you'd think that QL would look for the lowest familiar ancestor or something.

I'm not sure whether the file typing approach changed with catalina, or if the migration from qlgenerators to quicklook extensions broke things, or if it's just catalina being buggy but it's disappointing that the typing situation seemed better back in mojave.