
I am one of the few people who genuinely enjoys the current built-in Mail & Calendar apps on Windows 10 and Windows 11. I think they look great, function well enough, and have (historically) been quite reliable. They're lightweight, fast, and compatible with almost any email service you can throw at it.
So when I reported that Microsoft was planning to replace the Mail & Calendar apps with a new, unified web app based on Outlook.com back in 2021, I was a little worried. On one hand, Outlook.com is a functionally great website with lots of features that rival Gmail.com and other popular web-based email services.