I like being able to switch to any of my tabs using the exact same UI technique as I would for any other tab, and press qqqqqqqqqq to view and kill many of tabs in succession.
There's tabvention, automatic 'tab list' backup as bookmark folders if you reach a certain (configurable) number.
https://chrome.google.com/webstore/detail/tabvention/kcjmdpj...
https://www.one-tab.com/
I use it all the time whenever I get to 10-15 "idle" tabs I don't need that day anymore.