Different populations have different problems. When was the first time it was adopted by a major law firm?
Example: The OP cares about "redlines" because lawyers use that all the time and most others don't.
Example: The OP cares about "redlines" because lawyers use that all the time and most others don't.
I managed to get the desktop app working in Linux after messing with Wine and permissions (it had some cache files written to a relative directory and what not) and after telling management about it they figured the potential market for such a thing would be small enough that they could just send any support requests about it directly to me for setup help, and likewise tell the sales reps to forward inquiries to me if Linux came up on a sale or demo install.
In the decade I worked there I got exactly one call from a Linux admin at a law firm asking for the docs on using the desktop app.