Comment by MrPowers

Perhaps the better way to phrase this is "the day Lightbend deprecates SBT and tells the community to use Mill", but I agree with the sentiment.

Scala needs a new "official stack", hopefully Mill + utest/Munit + scalafmt (with opinionated settings).

Scala 3 + SBT + Scalatest + whatever formatting isn't going to grab folk's attention.