The reasoning behind not supporting (or requiring rather) markdown=1 in html elements makes perfect sense, however the new rules do make it more difficult to paste code and will result in some annoying scenarios. As a result, it would make sense to allow the opening html element to instead specify markdown=0 (essentially making markdown=1 be implied when omitted) such that no markdown processing is attempted until the end tag.

The issue is that this would require an end tag to be there (which is not the case currently). And requiring an end tag involves backtracking if you cannot find it, making parsing much more complex

I understand the issue, however thats a decision being made to make the life of programmer easier, not the life of the user easier.