I thought I heard Ark had changed its requirements since the initial idea (which if I remember correctly required CTV for non-interactivity), but this is good to hear I guess.
Discussion
There's many facets. For one, we can do a pretty cool protocol without any covenant. Then, simple covenants like CTV or TXHASH make it a lot more powerful. But then eventually, something more powerful like MATT can probably boost it to way beyond (single tx multi-user exits fe), but that's research still and not in implementation whatsoever.