My problem or lack of one is I have tons of ram because it's a video editing machine. And with modern browsers I rarely see crashes anymore. Sometimes my PC is on for a day or two with all the tabs open even multiple incognito windows, because I need 4 separate sessions for managing all the accounts, marketing and social media tasks I do, rather than meticulously having to logoff and logon each one over and over all day.

But I can't just kill my sessions when they get too big

I have OCD related to information, see my latest post here on that:
https://steemit.com/writing/@mikeparker/facing-writer-s-block-on-steemit