Just curious, but is this feature still beta in certain wikis?
Based on Beta Features, such features aren't meant to be left there indefinitely. Given that it seems as this extension is now stable in certain wikis, it should probably get an announcement and removed as a beta feature, see :
So either this needs to become an optional full feature, or yanked from every wiki that doesn't want it. If nothing else, it might drive individual wikis to ask for it to be enabled by default for casual editors, instead of become a gravestone in "graveyard of discarded ambitions".
Considering its popularity  chances are that it may become a default wikimedia extension and encourage volunteer developer improve its feature set due to widescale usage ...