Yeah I don't get it. While it's certainly not the post popular language out there, it's not like you as a user are impacted by the choice of a programming language it's written in.

Default apps are mostly good. Music is the only one I don't like in general, and while Epiphany is not my preferred browser, it seems perfectly capable (hell, it even syncs with Firefox Sync). The rest of the apps feel very pleasant to use and I never had to bother with looking for an alternative.