An example of how Strava is geek-compatible (so far! it may get ensh*ttified in the future). I found some old GPS logs from 22 years ago, when I first got a handheld GPS and geeked out with it, logging a whole bunch of rides and hikes.

It took a bit of work to get those converted to a modern format (load into ancient tool, which is still maintained, and write out as GPX files... one at a time). But then these GPX files can be uploaded to Strava and there they are! Activities older than Strava itself, fully integrated.

Also I've more than once had a "whoopsie" - app left recording during the drive home, for example. Download activity from Strava, edit the GPX file, delete the activity and re-upload from the file.

And when you download your stuff from Strava, you get a database dump. That's both good and bad; e.g. users are just numbers and you'd need to use the web Strava to translate them to names, but all your photos and all your traces and all your stats come down in standard formats (jpeg, gpx and csv respectively) and nothing is dumbed down; everything is in the best possible format for re-import to something else.