I did consider this. Having a single vendor is a risk factor. In my case it is mitigated by the fact that everything that is in their cloud is downloaded locall

I did consider this. Having a single vendor is a risk factor. In my case it is mitigated by the fact that everything that is in their cloud is downloaded locally. Then it is backed up using time machine to my Synology and additionally syncthing also duplicates it there as simple files with history enabled. I believe our mitigated most of the risks. If I pull the router plug I'll still have access to my data. If my house burns down - I can download it from their cloud again.