This is BS for players who have 100's of games and a year of play to start all over. I paid my dues. Now have to pay again ??? Sorry to say... lichess messed up this new implementation of a rapid rating BIG TIME. There exists a far more equitable method of creating this new and needed category, besides the system chosen.
"Your ratings will stay the same. For example, if you're rated 1633 in classical right now, you'll be rated 1633 in both rapid and classical after the migration, as long as you've played at least one game at each time control."
Nonsense You can not get a game unless starting over with a setting <1500. Not here for the rating but to find a game. In order to do so, rating parameter needs to be set <1500 for a quick pairing. After which I was paired with an obvious bot.