Hey,
converting all AI models from MDLX to glTF is taking quite a lot of time and manpower, some models are even so old we can not convert them (original author no longer active), so for now the AI community is rquierung the MDLX support.
With the last Update it seems that MDLX support has been "reduced" is some way (see open Bug reports on ZenDesk).
Now the question: Will MDLX support be kept in the game for some time (maybe ever?) and are issues with it fixed? Or is MDLX-Support been dropped and new issues will be ignored?