[kadomony]

I bet they were already in talks for being acquired and not open sourcing Arc was one of the conditions.

Who knows what Atlassian will do with it, but I did find it a bit frustrating that in the Atlassian blog announcing the acquisition, they showcase images of Arc when they're specifically talking about Dia. The two browsers do not have UI parity, and much of what I loved about Arc would need to be recreated in Dia.

[ljbred08]

Exactly! I hope Atlassian actually has some sense: either Arc's UX needs to be merged into Dia or Dia's functionality needs to be merged into Arc. You can't keep either going otherwise.