[smoldesu]

They've talked about it being on the roadmap for a while, but I'm not aware of any recent advancement in getting it to work cross-platform (much less publishing the source).

Indeed, "at this point" they've demonstrated that cross-platform development is a low priority for them. Even if they do ship a Linux client, I feel like it will be a hard-sell when there are so many other terminals treating Linux like a first-class target.