Dude, you gotta fix the little arrows that let you scroll the tab bar. Each click just scrolls it like 10% of a tab so it takes 10 clicks to move it 1 tab. This is ridiculous.

Personally, I have a 2560x1440 monitor and I keep ST on it fullscreen. I usually have ~7 repos open but sometimes need to open up to 15. I can fit 11 tabs but look at how much wasted space is in each tab: https://www.screencast.com/t/vKrSNe5APy

On the older version of ST, like 1.5 or something, the tabs were only as big as the name of the repo so each tab was much smaller. This worked great.

Alternatively, make the tabs just add extra rows so instead of having a scrolling list, the tab bar grows vertically instead.