I used a Samsung Q30 sold as Dell X1 as primary device for a while about a decade ago. It's 12" and for the time it was great. Fanless, quite fast and light AF.

I used a Samsung Q30 sold as Dell X1 as primary device for a while about a decade ago. It's 12" and for the time it was great. Fanless, quite fast and light AF. So yeah, 11" is doable. Depends on what you are doing and how.