MZ has the newest features & therefore the least amount of limitations. Although the plugin library for MZ is smaller than MV's (because many MV plugins aren't compatible with MZ), there's a plugin for MZ called
Fossil that makes MV plugins compatible with MZ, so you get the best of both worlds.
However, it doesn't magically make everything compatible so if a MV plugin still doesn't work with it, just let
@Restart know & he might be able to make it compatible (if he isn't slogged with list of backlogged plugin requests).
Also, any graphical or audio assets made for MV are compatible with MZ, such as DLC content from this site.