Relegate Scala 2.12 support to a branch? #4240
Description
Perhaps the next minor release of Cats Effect could drop Scala 2.12?
If any critical bugs or security issues are found in the previous minor release, more patch releases in that series could still be published.
previous similar discussions:
- dropping 2.11: Drop support for 2.11 on master #667 (dropped in 2019)
- dropping 2.10: Remove support for 2.10? #179 (dropped in 2018)
We had a long discussion about this on Discord the other day, beginning here: https://discord.com/channels/632277896739946517/632277897448652844/1328175562442801283
@djspiewak's main concern was that sbt 1.x is still on Scala 2.12 and as a result people might be using Cats Effect on 2.12 in their builds, even if their project code is on 2.13 and/or 3.
sbt 2.x will be on Scala 3, but it's still in milestones and we don't know how long the final release will take.
My own take was:
anyone who needs cats effect at build time should be fine with the last minor version. cats effect is mature software
but I don't know the Typelevel ecosystem as well as some others.