Comment by kristoff_it

I fully agree, new file formats are a nuisance, especially to make. I wouldn't have done it if the existing solutions felt good enough.

Want to add logic to a HTML template? Say goodbye to syntax highlighting, autoformatting and any form of error checking.

Want to embed a video in markdown? Gotta put HTML in your content, the exact kind of thing you were trying to avoid by using Markdown in the first place.

That's a very shitty in-between situation that I personally wanted to get away from. I'm sure for people who don't stress too much about these points (maybe even just because they do less of this kind of work than I do), it's more valuable to leverage formats that they already know, but for me it's a death by a thousand cuts.