What does HN recommend as a better Win10 email client? I'm familiar with Thunderbird and I'll probably switch to it if nothing else, but I'm not a huge fan of the UI/UX.
This might sound glib, but as someone who has used both Thunderbird and Outlook extensively, I don't recommend any desktop email client. Email clients were designed for a whole different era, and only work well in that context. Gmail, Outlook.com/O365/etc, are designed for you to "keep everything." Problem is that all desktop email clients aren't designed that way, they want you to have a very small limited subset of…
the default answer to op's question in enterprise land (where windows is still treading for relevancy) is Outlook.
thunderbird suffers the issues the comment mentions above -- barfs with large dbs, no support for exchange, not sure if it even supports push notifications, etc
it should be noted that mail on mac works well and the win 10 mail app this article is all about works pretty well too, which is why its a travesty MS is going to ruin it.