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They're talking specifically about an Android app. Almost none of the apps you referred to are available on Android, let alone with the features you mentioned.

As for the Markdown vs Word doc argument, sometimes you want to do things with your data that just isn't easy or convenient if it's inside a binary/proprietary filetype like doc/docx. Maybe that's not a use-case that you've ever dealt with, maybe it's a "doomsday" scenario that you think is unrealistic and over-reactionary, but really who cares? There's no need to "yuck someone's yum", just because you don't get it.