they never said that, but it's basically abadonware. look at the commit history: https://github.com/slick/slick/commits/master you can also look at the contributors page: https://github.com/slick/slick/graphs/contributors the guys who primarly contributed to it basically left lightbend, and in 2019 he shifted his priorities.
it only had 28 commits since 2020 (including merge commits and changes to the build process) it's basically dead until somebody steps up.
well as said 28 commits, NOT ALL were code. MOST of them were basically "fix build"/update dep. so basically the project did not change for over a year.
AND 2019 wasn't really better. 3.3.2 (3.3.3 was mid 2020) was in JUNE 2019 and 3.3.0 was at the beginning of 2019. there won't be a 3.4 anytime soon, if nobody steps up and starts maintaining it, there won't be a 3.4 at all.
slick is heavy on macros it will not survive scala 3