@hadronized @Gina at the moment there is only one category of apps that I cannot replace; Banking apps.
In order to tackle that I use two phones.
One proprietary phone with the banking apps - that stays securely at home. This actually feels more like a feature rather than an inconvenience.
One non bigtech OS phone as the daily driver.
So far this seems to be the solutions that works for me.
But I am fully aware that this is not a real solution for most people. Or a solutions that scales.