Ultima Online first launched way back in 1997, and since then, the game has received 100 updates, the most recent of which, unceremoniously coined “Publish 100”. That’s about 5 big updates a year (not includes hot fixes or small changes), and 2018 isn’t even over yet. The could could easily hit 101 or 102 major updates before the end.
Publish 100 features a metric butt load of bug fixes, quality of life improvements, a few client changes, and a couple art updates.
For the moment, the patch is up on the PTS, expect it to go live soon, and in the meantime, you can check out the patch notes for more.