I’ve been using mailbox.org for a couple of years now (a full switch from gmail to make sure I hadn’t left anything over took me about a year), and I’m very happy with the service, can wholeheartedly recommend.

It’s normal. As is to stick to one distro for ever. It’s great to have options, no?

https://f-droid.org/en/packages/org.dslul.openboard.inputmethod.latin/

I’ve been happily dualbooting Win10/Mint for years on the very machine I’m writing from. Zero issues with boots, GRUB, no need for flatpaks, both systems work fine, both configs heavily customized.

What was your starting point? Having Windows on the machine already and installing Ubuntu on top of it? (that would be commonly regarded as the ‘correct’ order) If not, and you can afford to scrap everything, that’s what I’d go for. If yes, and it’s Ubuntu that’s messing up your dual boot, I’d see if Windows can be restored after removing Ubuntu, and then try a different distro (I’d go with Mint Cinnamon, it normally provides smooth install experience).

What’s your long-term experience?

Excellent. After uninstalling it never comes back.

Reminds me to donate, been a while since I last did that. Thanks.