Edit: so I just looked and it turns out you can enable tab bar scrolling on chrome://flags/#scrollable-tabstrip. Why is that even disabled by default?
More precisely, why 100 tabs in 1 window instead of 10 tabs times 10 windows?
Imagine you snap your browser to half your screen. Assuming it's not an ultrawide, you'll be able to fit maybe a dozen tabs before they're so tiny to be essentially useless.