Is 3D non-coplanar conformal radiotherapy preferable over arc therapy for lung SBRT?

To build on @Dr. First Last insights, which I appreciate very much, I want to note that for those who have been doing SBRT for some time, VMAT delivery is a relatively recent development that, as mentioned, may enhance the patient experience from the delivery standpoint. At Cleveland Clinic, we have...

To add to the excellent posts above, it might be educational to explain why many Rad Oncs felt (and some do still feel) that non-coplanar 3D was (or is) superior to coplanar 3D or VMAT/RapidARC/IMRT NOS. There's at least 2 reasons that are cited (I know this b/c I'm a coplanar SBRT person and I got ...

There are several advantages to VMAT relative to standard 3D therapy, and most revolve around speed of delivery. Non-coplanar treatment with 6-9 gantry angles can take over 45 min from first photon to last photon. VMAT deliveries tend to be, at most, 3 ~ 1 minute arcs over perhaps 5 minutes. This is...