The web app comes with the same snooping (every little bit of analytics mentioned in the article is something that the Teams servers see - you are not stopping

The web app comes with the same snooping (every little bit of analytics mentioned in the article is something that the Teams servers see - you are not stopping them by not using the app) and similar resource usage - though as bloated modern browsers are, it might be masked by the "shared" resource usage with other bloated web apps in the same browser.