Sep 5 2015
Sep 4 2015
Would like to mention that somewhere between 33,5K and 35K entries, Special:EditWatchlist began to load and work, if very slowly. Selecting more than 10-20 entries causes increasing lag.
@RP88, how expansive is your watchlist? Mine is currently 33K (much smaller than previously due to watchlist tech issues) and I think the load time was around 5-10 secs with cat changes on.
Aug 30 2015
Confirming that I didn't notice the Wikidata watchlist integration until category watching was undeployed.
Aug 20 2015
It probably works great for wikipedias but over at Commons we really need some additional features. Users are freaking out since their watch list feeds just exploded and not everyone thinks to check for the new filter/opt-in in the prefs rather than the watch list page options.