>>> the best software accepts many formats and "deals with it,"

>> We collectively discovered that we were underestimating the long term costs, by a lot, so its lustre has faded.

>> If you'd like to see why, read the HTML 5 parsing portion of the spec.

> Can you give a hint as to what the issue is that one should find reading a portion of the HTML 5 spec

I think the point was that the HTML 5 spec tries to parse all kinds of weird input instead of drawing a line in the sand and forcing the input to follow a simple format?