I write most of my content in markdown or asciidoc and I don't pay attention to whether it's b or strong :)
In practice today, that's fine. Typically authors have a hard time differentiating what "emphasis," "importance," and "bring attention to" mean to them. Therefore, nothing conveys a distinction by default.
In practice today, that's fine. Typically authors have a hard time differentiating what "emphasis," "importance," and "bring attention to" mean to them. Therefore, nothing conveys a distinction by default.