That question came up to me, when recently working on one project I needed to restart my PC several times. And therefore, while I used 3-5 web apps I needed to log back in to each one of them again, after each restart. And I started wondering if privacy-wise that auto-clear feature is worth it or not? Has anyone maybe tested that?
Anything that requires PII in a separate browser that doesn’t clear on exit. General browsing on my main browser, which clears data on exit, except for a small list of exceptions. It doesn’t defeat non-cookie fingerprinting, but I at least get rid of all the cookies that I don’t want.