@sky-runner I agree completely, I was just suggesting quite a lot of what you would like is “almost” there so the step forward wouldn’t be massive.
There is the suunto+ app that you can setup with notes at times or distances (I think) that might also be of help if you’ve not tried it. I do think it would be good to have more of this baked in though. As you say, the FIT file format would allow for custom fields so being able to add metadata to a waypoint in a route plan such as arrival time or nutrition notes or anything else you want would be easy and flagging the waypoint in some way could allow the watch to show stats between points or assent to next point etc. very easily.
@2b2bff I think Suunto’s biggest concern with increasing the number of S+ apps, based on previous comments in this forum, is the battery drain. I get the impression Suunto are keen that their watches meet the advertised battery duration even with all the features in use - including maps, vertical climb info and 2 S+ apps. Maybe a solution here would be to allow more apps but with a warning that pops up to highlight estimated battery life will be less accurate with more apps. Personally I never push the limits of the battery on my Race S and would love to make more use of S+ apps - or even just 2 apps and a workout.