I just replaced/dumped the smartphone hub on my 8s. Easy job, took about 30 minutes of working very slowly. Big improvement, especially the peace of mind in knowing that I'm not going to lose my smartphone when I hit a bump. The ability to customize to a limited extent is good too. What actually pushed me over the edge, so to speak, was the most recent "update" to cobi.bike which actually took away functionality, believe it or not. The "update" took away reporting of power and heart rate to Strava. Bosch tech support just said "reinstall" and would not confirm or refute the problem in their own hands. OTOH, I reproduced the problem myself with two different android phones.
I wish a solid, reliable manufacturer like Trek would pay more attention to its frustrated customers in its choice of OEM components like ebike displays. Yes, there are satisfied customers like my spouse who doesn't even use a smartphone on her 8s, just the built in display. But the rest of us? It would also be nice if Trek realized that some things on cobi.bike are totally useless to US customers, like Rydies! And you can't even get rid of it,