I'm assuming they're getting rid of all that native code for Windows and Mac and building something new on top of Electron. If so, why there is no Linux distro?!
Yeah building on top of Electron makes sense. As far as Linux goes I'd give it some time. If it's anything like Atom it'll be opened sourced so Linux support can be added (if anything specific even needs to be done). Their primary customers use Windows and Mac OS X so it makes sense to me to target those first.
I guess it doesn't matter that git itself was created for Linux kernel development. Oh well.
I'd love to know how many of their users are on Linux, especially when broken down by activity levels.