Why Dalga instead of of some other job scheduler? Because all service software will eventually be rewritten in golang, apparently ;). Don't hate the player.
To be honest, I like the fact that a lot of the 'old` stuff is being rewritten in Go because I find it a much easier language to grasp than C, C++ or Java. So I say rewrite them all! (just my opinion of course)
Well that's a driver for golang for sure. Additionally, while we're complaining about golang not measuring up to our programming sensibilities, the people who write us checks want 1) correct, 2) on time, and 3)in budget. If golang helps us do that better than other languages in spite of the fact that it doesn't have generics or whatever (anecdotally seems to be the case), no need to apologize for it.