> This enables browsing over SSH when you have low bandwidth.

Their demo is down now, but I have tried it in 2018 and unfortunately it was pretty bandwidth-heavy (about 100 kB/s while displaying a static webpage): it was permanently refreshing the entire terminal contents. Maybe they have fixed it since then, or it will be better with Mosh (as they suggest on their homepage).

I think that rendering server-side and transferring text as simple text blocks and images as heavily compressed HEIF/WebP in a special graphics client (or even a standard web browser) would be better. I was using something called Ziproxy over GPRS back in 2009 -- it was compressing HTML/CSS on the fly and recompressing images to JPEG with terrible quality.