The other major alternative to consider is RTF. I standardised on that about 10y ago, planning for a 30y horizon. It is a more complex format than Markdown, still text-based, but biased towards WYSIWYG presentation and editing, while Markdown is usually not WYSIWYG in the editor. Both formats suffer from a lack of standardisation, though Markdown seems to have more problems in practice - I've never had an issue caused by RTF incompatibility. Both are very widely supported. Both formats are very widely supported and it can reasonably be expected that this will continue.
I prefer RTF for two main reasons:
* I can't express simple formatting such as "make this text red" in Markdown. No, I don't mean "accentuate this text and leave the decision on how it looks to someone else", I really do mean "make this text red". I do a lot of public speaking, and I want to keep to certain conventions which are easy to read fast.
* Most of the time I am writing text, not reading a version after it goes through a formatter, so I prefer to see it formatted on screen. That's really a limitation on Markdown editors, but it's almost universal so for my point of view, it counts.
I prefer RTF for two main reasons:
* I can't express simple formatting such as "make this text red" in Markdown. No, I don't mean "accentuate this text and leave the decision on how it looks to someone else", I really do mean "make this text red". I do a lot of public speaking, and I want to keep to certain conventions which are easy to read fast.
* Most of the time I am writing text, not reading a version after it goes through a formatter, so I prefer to see it formatted on screen. That's really a limitation on Markdown editors, but it's almost universal so for my point of view, it counts.