The grandparent poster stated that they don't want to encapsulate stuff in UDP.

Generally, yes. I suppose if the client were unable to override the default recipient port for DCCP-UDP Encapsulation (6511) and the DCCP implementation were enforcing rules such as back off on the client then it is still a better option to give a client a DCCP socket that can enable UDP encapsulation rather than giving inspecific access to UDP.

The point that seems to be getting lost is not that I want SCTP or DCCP support. Its that I don't think anyone should accept anything that could become a UDP arbitrary access loophole. The point of the current path is to replace the problem techs and add use cases safely as we go to gradually pay for a better network by making standards that aren't just the easiest thing for web-devs.

Every time someone tries to walk too close to the edge in a way that can open security problems for people who aren't running a server fully opted-in to web 2.0/etc, they risk a security backlash that could ban browser updates and effectively delay/kill unrelated innocent features and fixes with ripples for ~5-10 years.