Xen vs. virt (TAILS) for emulation obfuscation, or a new Qubes Live USB

Has anyone considered making a Qubes Live USB again? An alpha version was made some time ago. Anonymity and security can be enhanced though emulation. TAILS can persist and uses virt. What if there was a Qubes release similar to Tails with Xen instead instead of virt and Whonix instead of Tails collection of apps?

Does anyone know why the live release of Qubes wasn’t developed further?