I spent ages getting clothing on my avatar in Marvelous Designer, laid it all out nicely on multiple UV's (as per the UDIM workflow), made it look nice in Substance Painter, and then I go to import the clothing as an OBJ into CC3 and the UV's are all messed up. 

Clearly CC3 isn't recognizing the UDIMs I set up in Marvelous designer, its just mashing everything onto one UV map.  How stupid that my only option for working with UDIMs is if I export a character or clothing item native to CC3 to Substance, and then back again... Like wtf?

Why doesn't CC3 have more control over UV maps and UDIMs like literally every other 3D program?  Is this on purpose, to keep us buying their super overpriced "packs" of clothing (much of which just doesn't look as cool as what I can find for MD?)...