They could already have access to your emails, because… you’re running their OS. They can slip in any code they want and run it with NT AUTHORITY\SYSTEM-level privileges (comparable to root-level privileges on Linux systems).
If you run any other OS you’ll also have to trivially trust the makers of that OS with root-level privileges (or comparable).
(Personally I don’t believe that MS is scanning all your local emails, but they certainly have the technical possibilities to do so very trivially.)
And that's why I'm explicitly noting that they're not FOSS, doofus. Besides, if you're using Windows anyway, using its built-in email client is not a huge stretch.
Because Apple ships a great one with the OS, so the necessity to make an alternative is less. Compare this to the garbage that passes for e.g. the Samsung weather app.
The renewables generate electricity mostly when there is sun/wind, so there is an oversupply at those times and a need to burn natural gas at other times.
The nuclear plants would generate electricity 24/7 with little waste.
Either way, now they are investing the money in digging up lignite, so it's worse than either renewables or nuclear.
IIRC all plugins you can get via the offical plugin directory are GPL-3