Bitbucket has had it's own fair share of issues, let alone the "we're pulling Bitbucket offline for 5hrs to move to a new datacenter" debacle not so long ago. I understand why they had to do it but it is indicative of some issues with their architecture.

They probably haven't gone offline through a DDoS yet because they're just not that popular to warrant an attack but I wouldn't bet on it that Bitbucket would fare any better.

It's not fair to compare scheduled downtime with being down for a few random hours because of an attack (or any other reason)

GitHub was also offline for a not inconsiderable period of time fairly recently for a datacentre move.

bitbucket goes down just as much, if not more than github. still love em though.

but they arent entirely honest about downtime.

sometimes they are down, ppl are tweeting it and status page is all green lights.

but still love em.