The kindest thing you can do for yourself in 2024 is try out Spike - what email should be.
You’ll never look back. It’s one of the best products I have ever discovered. I would totally invest it in if the option existed but I don’t think it’s possible at this stage.
The good thing is you don’t need to get rid of your legacy email client - Spike will run adjacent to it. You can try it at no risk. It’s from a small Israeli company which gives me confidence that they understand the need for confidentiality.
Also see Slack - Making it faster to talk to the people you talk to most often