I am a regular Brave user and prefer it over any other browser. However, in the attempt to minimize memory usage (which Brave already excels at), I found that the Vivaldi browser with its email panel took less memory than either Brave or Vivaldi combined with an email client such as Thunderbird or Evolution. Also, I don’t really want to run a browser version of AOL Mail or Gmail.
Just thinking out loud, Brave folks probably could do it better, and in Rust. 