At work I switched from the Outlook client app to the web version as soon as we migrated our email from on-prem Exchange to MS365 (cloud hosted).

Specifically, I get my email at outlook.office.com. Works great in Safari and Chrome on Mac.

Searching old emails is way faster and easier in the web version. It takes up no space on my machine, and there are not thousands of potentially sensitive emails sitting on the hard drive of a laptop I carry around. Way better all around.

I also run Teams in a Chrome tab instead of the Mac app. It runs way more efficiently that way for some reason.