I haven't gone through them all yet... but so far, not a single one involves breaking into dom0 with HVMs.
I think for this reason, QUBES 4.0 is switching over to HVMs.
I don't know when QUBES 4.0 is being released. Presumably not soon.
So in the mean time, I'd like to manually switch over to HVMs myself using QUBES 3.2-rc2.
As far as I can tell, the only thing stopping me is the lack of sound support.
I saw over on qubes-devel that you can pass the entire sound card to your HVM, and therefore, you can actually get sound within an HVM.
So, I'd like to know how to attach a sound card to a VM.
Also let me know if there are any others issues, other than sound, stopping me from manually moving over to HVMs myself.