I think tho that Markdown hasnt won the plain text battle - plain text has. Only a very small percentage of plain text docs are markdown...so small it wouldn't even count...
Reddit, Stack Overflow, GitHub/BitBucket (readmes, tickets, wikis), and it's also used by a couple of CMSs, blog platforms, and static website generators.
Virtually all of the text I write is Markdown. Even this very comment is written in a subset of Markdown (and so is yours).
Virtually all of the text I write is Markdown. Even this very comment is written in a subset of Markdown (and so is yours).