I totally disagree. It’s like, “it would be cool if you could edit video files in EmEditor, please, I want to see this in the next release”.
The beauty of EmEditor is exactly that it sticks to the principle that it services plaintext files. If one needs rich text editing, there are thousands of freeware/commercial sofware that do exactly that.
I have been willing EmEditor to support more elaborate XML editing, and comma/tab delimited text file editing (in cell grid), as it seems to be related stuff, but I understand that it could be matter of personal subjective preference, and if Yutaka doesn’t see that EmEditor has special features for those special text file types, it’s his product after all.