[hnnh44]

1. This is easily done, both on free and gsuite (paid) depending on how you want to implement it. I have multiple Gmail accounts with dozens of emails attached to each. Multiple configuration options.

2. I've never used a calendar outside of Google, and avoid it where possible, but find Google's calendar easy.

3. I think this is a great feature. I use it to collaborate on tons of things, with the understanding that it's not 100% secure, and acting accordingly. Maybe it doesn't suit your particular use case... and that's fine. It doesn't mean it doesn't work great for other uses.

^ all of that considered, I still agree fully with the original article. I've taken a few steps to have working backups and have fallback plans but having an account closed would still be disastrous.