no, it wouldn’t magically fix it, it’d only worsen that? also, even a fully updated V itself crashes when changing these accessories with a trainer, including when running dlc_mpimportexport as well.
DLCs aren’t things you can ‘update to’?
… but you can create interiors just fine already by making .ytyp files with MLO instances? Having additional DLC assets locally (that you can just add to your server specifically) won’t magically give you more ‘possibilities’.
Also, see this post:
Adding the cars will make you people complain “omg, the new features don’t work!” - and again this is not and was never meant to track every single GTA update, but to be a clean-slate platform for people to develop stuff on.
or you can just add better car mods of your own and not rely on pirating R*'s paid content?