Board Thread:Community Announcements and Events/@comment-30996952-20190224004400/@comment-1600847-20190225121346

Note for ESO PC players:

ZOS announced in a blog post that logging in today you'll get a very long load screen when you log in for the first time: anywhere from 10 minutes to several hours. This will only occur the first time you log in after Update 21 and won't happen after (hopefully).

This is apparently tied to how many items you have in your inventory or bank accross all characters (so you can't log in with a character with 0 items to speed up load time). Closing ESO will reset this login, so don't close it in frustration or it'll take even longer.