I like their UI just fine. Speed, smoothness, never had much of a problem. And the amounts of features they were able to come up with the last few years is pretty impressive.
In terms of features I quite like GitLab as well. I just think it's time they rewrote it in something much faster than Rails.
I have literally never used a fast GitLab instance. Anecdotal evidence, I am aware. I'd still venture out to claim this says something about the average speed of your average GitLab installation though.
Hmm don't see any rewrite in their cards though...they're pretty much gonna ride this thing with Ruby. If Shopify did it with their monster scale I bet they can as well.
