I use a method along the same lines. I have two 'triage' folders, one for internal emails and one for external. Everything else gets a folder and a matching rul

I use a method along the same lines. I have two 'triage' folders, one for internal emails and one for external. Everything else gets a folder and a matching rule once I get more than a few emails from the sender or it is evident that I want the emails to be identified and sorted. I use nested folders to group people and topics then a rule that pops a notice if an email is sent to me directly. It varies per org and per role but I end up with a structure that is excellent at me seeing and responding to my emails in a timely way. I make sure to have conversation view on and that provides cross visibility in the folders. I agree with you on the tasks and archive recommendations as there is even more integration with To Do and Planner in the MS ecosystem. It is important to try out different methods and figure out what works best for you. Personally, I like making the computer do the work and that's been effective even in the upper thousands of emails.