In reply to glenn0010:
I have got both (GoPro 9 and EM-5 iii). I also take a lot of photos on my phone (iPhone 11 Pro) and sometimes carry all three of them on adventure outings (walks rather than climbs).
They all have their uses, which are very different.
The photo quality on the Hero 9 has actually improved a lot compared to the 8, but the photos I take on my phone come out much better in all but the best lighting conditions. The Olympus obviously beats both.
But there are other things to consider: What the GoPro does really well is taking action snapshots, particularly selfy style. You point the thing and take something like 30 pictures in 6 seconds and then choose the best. The wide angle also means you tend to get things into frame. I quite like the fisheye distortion for some scenes, but it does not look too realistic. I can also slide the GoPro into a pocket and take it onto a run. I cannot do that with the EM-5.
Using a camera like the EM-5 is a bit more involved. It's not as point and shoot. TO get the most out of such a camera you need to take the time to play with the dials, which might not work well when on a climb or run. The computational photography of a good phone and a GoPro might get better results in such scenarios. and It's all a bit of a compromise, but I recently find that I take my phone and GoPro onto adventure outings and reserve the EM-5 for proper photography outings.
Post edited at 18:44