I don't have more than 5-6 tabs in my personal life, but in my professional life I regularly have 15-20 open. By all means a low number compared to some maniacs rocking hundreds or even thousands of open tabs. My case is like: 3-5 tabs for secretary duties: email, calendar, Jira, maybe a google doc, then 2-3 random tabs then multiple tabs for grouped tasks.
E.g if I want to review a PR I need to have the jira ticket, the figma designs, the API dashboard, the PR link and the actual app open. That's 5 tabs for a single PR review + more if I need to go over some documentation.
And since a review takes its time and I often have to context switch a lot, being able to quickly collapse 5-7 tabs under a "Foo PR review" group is super helpful.
E.g if I want to review a PR I need to have the jira ticket, the figma designs, the API dashboard, the PR link and the actual app open. That's 5 tabs for a single PR review + more if I need to go over some documentation.
And since a review takes its time and I often have to context switch a lot, being able to quickly collapse 5-7 tabs under a "Foo PR review" group is super helpful.