So now we have moved from "tagged template literals have all the complexity of Python templates" to "if you define a specific template tag and use that, you can replicate one feature of Python templates". No mention of the other example I mentioned (which, by the way, wasn't an exhaustive list).
Now, I'll just ignore that you're still deliberately misrepresenting me in the hopes of gaining some actual knowledge from this discussion - please show me: which editor supports syntax highlighting for the specific example you just mentioned? After all, that was the topic of discussion - not whether it's possible to delay "tagging", but whether it's easier to do syntax highlighting for JS template tags. Please show me an existing editor, IDE or git repo for a tool that would highlight your specific example based on the `html(...template)` call in line 4 (so no heuristics based on line 3). Surely you're not just throwing random examples at the wall to see what sticks, right? You've actually been following the discussion and are arguing in the context of it?