I'm a paying Strava user and it infuriates me that there is no real alternative.

The website can be slow at times, there's a strange difference in functionality and look and feel between the app and website. AND THEY STILL DO NOT SUPPORT MULTISPORT (brick/triathlon in single activity).

I'd guess segment leaderboards/KOMs/comparison is one of their most popular features - will be interested to see if this increases peoples take up of Summit.