Yes, scala is big and complex, but IMO, it remains by and large coherent. That might be the ultimate reason why scala developers from all kinds of different backgrounds didn't abandon it even after facing many of its shortcomings and bugs.

I think scala will remain a very favorable language for any team that needs all of the following three.

1, ability to do functional programming with a strong(ish) type system

2, ability to do actor based parallel/distributed programming

3, Java compatibility