Moving off Apple's ecosystem. Their definition of privacy/surveillance falls short of "human rights" level privacy and only protects against advertisers and hackers.
Fair enough. I will point out there is no commercial entity that does better than Apple on any of these counts. Open source will only get you so far: every hardware vendor other than Apple has lower standards for labor rights and sustainability.
As sweet as their hardware and ecosystem is, an open ecosystem is better for users. I'd move off if I could get most of what I enjoy within Apple ecosystem.
Something open that beats Apple's ecosystem doesn't yet exist today. But you can help it get there by being a customer and telling companies what you want. Re-creating an E2E iCloud suite doesn't seem impossible. For example Standard Notes is close to beating Notes - but it's still too complicated but with focused work on the UI it could win.
Is it that hard to create an open source hosted version? Just get out of the way and let me take a note!
As I posted in this thread, I will pay $100/year for this solution. The closest I've found is Standard Notes, but it's missing a few things.