Comment by rmavis

It's mostly the lack of nesting that convinced me not to use xit and to make my own format: http://richardmavis.info/does-the-world-really-need-another-...

And I'm curious about nesting being "pretty difficult to implement in tooling"---how do you mean? At least with emacs I found it no more difficult than counting whitespace characters: https://git.sr.ht/~rfm/tdtd-mode/tree/master/item/readme.md