So who exactly is the child?

I keep seeing people say that the Squeak user interface will turn off “serious” developers.
It seems to me that a serious developer knows full well that the colour of the IDE and the shape of the buttons have very little to do with the quality of the programming environment.

If anyone is turned off Squeak or Smalltalk because they felt the Squeak 3.8 UI was too childish for them, then they were never interested in learning it in the first place.

There’s no law that says serious work can’t come from a colourful environment.