We've added 4 big features just in the last 12 months
+ Pipelines + Git LFS + Smart Mirroring + Merge Checks
More here just from Oct 2016: https://blog.bitbucket.org/2016/10/12/scaling-in-bitbucket-c...
Not to mention other features like 2FA, Projects, Snippets, Bitbucket Connect, etc. in the last 2 years