This seems great, and I've always wanted something like this (though for me, the cloud is a dealbreaker). A bit too expensive for my uses, I think the corporate use-case makes much more sense so good for targeting that!

I'd prefer to have a virtual machine on the phone where I could isolate apps etc. Would be nice with a second phone number tied to that virtual machine, maybe a sip one could work.

But since that doesn't seem to materialize I'm playing with the idea to have an old phone at home and remote into it using VPN+VNC or something from my real phone. Would work in theory but last I experimented with it the experience was pretty bad.