Back when I used Gmail I just kept everything personal and work related but when I moved away and started paying for email storage I took a different approach. It didn’t make sense for me to pay considerably more storage for something I almost never use.

I ended up backing up all of my emails outside of the last 5 years and stored them on an offline drive where I can reference them as eml files if I ever need it.

Going forward once a year I’ll export and purge the oldest year in my account.

https://mullvad.net/en/help/partnerships-and-resellers

Glad to see someone forked it though, I might give that a try again.

I’m logging in and out of client accounts - often for services that don’t do delegate access - so private windows work nice for me to make sure that I’m always cleared out of what I was working on before changing to a different project. Often I copy things in private windows that aren’t secrets, it just happens to be how I used the feature.

Containers and Profile are great - but - I’m not trying to have 50+ of them at work, much easier to flip open a private window.

I acknowledge my usecase is unusual and for most I think the feature makes sense - I just want to be able to turn it off, an about:config would be fine.