It’s funny you mention echo chambers because most of what I’ve seen here is just that.
You can’t go into a community and disagree with something without getting downvoted into oblivion. The hivemind here is the same as it is on Reddit, the difference being is that more people are left-leaning on the political spectrum, but hivemind nonetheless.
I have to use Office 365 for work so there’s no alternative but I think these ads are just for the non-enterprise version? I use Thunderbird for private use but tbf, I send like 2 emails a month at most. Are there many people that use outlook daily for private use?