At the risk of sounding like a basement dwelling lazy millennial, could someone with map skills stitch together all the Strava segments from each of the accounts we know are RYs, to visually present the missing stretches? Some places will have two or three traces - some from the legit data uploaded on the Joanna account direct from the TomTom - and some from the massaged GPX data from the Rob Young account and his other sandbox accounts. If they are overlaid on a map it's a visual way of showing what's been shared and what has been conveniently left out, and for which account. I just don't know where to start doing that kind of task.
Strava heat map if you are a premium subscriber. or there are third party tools that do it, you have to give them access to your account of course. So it would need a clone of RY's data.
I'm developing a web app for that (in my mom's basement), but at the moment it only uses Garmin Connect data and it's a little rough at the moment.
The demo is here:
and github repo is here:
I can get it to work for general gpx files if I have access to a bulk download.