While I'm not annoyed by the slowdown that much, what made me not trust them anymore is being careless with the system. For example I did a review recently on a PR where the collapsing sections were not visible and made 2 patch fragments look like continuous code. I commented that this makes no sense and won't run... only to look like an idiot later. Fortunately the issue was fixed by the time I looked at the PR again, but still, much less trust now.