If the team uses Zio, or maybe they’ve gotten lost in the religious war of Scalaz, vs Cats, vs Zio... One of the major issues I have with Scala is how fragmented the community is. Everyone has an opinion on how something should be done and everyone thinks that everyone else is wrong.
Well you have extremist who believe that you have to cull the community due to a few bad (but still contributing) apples. Additionally you have a big lightbending company that produces some questionable contributions to the community as if it's the "scala-endorsed way".
Don't get me started with the whole forcing of "lets be python like" initiatives as of late.