alt Hacker NewsYes, agree. Some services (e.g. komoot) apparently have good data, or can work around it. Others are struggling with lack of precision in the DEM data. As much as I like the tweakability of BRouter, the tracks generated never give realistic elevation info.
Garmin and Strava must be sitting on a gold mine of practical DEM data based on ride and hike records. They have huge databases from mobile devices recording GPS position, speed, and pressure.