> At the limit, sure, maybe there are tradeoffs between freedom and security. But there's lots of technical solutions that we could build right now that give a lot more safety without losing any freedom at all.

Everything you have suggested in this post takes away freedom. There is no solution that doesn't take away freedom / your control. There is always a trade off.

> Like sandboxing applications by default. Applications should by default run on my computer with the same permissions as a browser tab. Occasionally applications need more access than that. But that should require explicit privilege escalation rather than being granted to all programs by default. (Why do I need to trust that spotify and davinci resolve won't install keyloggers on my computer? Our computers are so insecure!)

This already exists on Linux.

I run Discord/Slack in Flatpak. Out of the box the folders and clipboard permissions are restricted. Only the ~/Downloads folder on my PC is accessible to Discord/Slack. You can't drag and drop things into these apps. Which makes sharing content a PITA.

If you don't want to worry about things like keyloggers, you should run an open source OS and use open source programs where you can verify that there are no key loggers. You should also make sure you find out what firmware your keyboard is using (many keyboards themselves have complex micro controllers on them that can be programmed).