Your rationale is that this provides the benefit of 'more
automated capabilities'; you mention that insofar as HTML is produced
by automated tools, the cost to users of those tools is minimized
(assuming the tools have migrated).
However, it was still hard to figure out what problem it is you're
solving, beyond 'lack of more powerful features'; the benefits are
dubious to me, and I'm skeptical about the estimates of low cost.
Can you elaborate on these points?