Starlink-based ones have enough bandwidth for the whole plane to have workable bandwidth (just rate-limit based on client so no single heavy user hogs the entire bandwidth).

There's also an European one whose name currently escapes me which uses a custom flavor of LTE and special ground stations that also happily provides hundreds of mbps.

Capacity is primarily an issue on the legacy BGAN-based ones where you have a handful of mbps for the entire plane.

You can do 100s of mbps with a flag and a pair of binoculars...

Sorry, pet peeve: do you mean MB/s, Mb/s, or something else? Probably not the milli-bits per second (mbps) that you wrote.

I mean Mb/s; just reusing the same terminology a lot of speed tests use (they report in Mb/s but often refer to it as "mbps").

mbps has always been used for megabits

That's EAN, also used by BA as the backhaul.

EAN is a joint venture between Inmarsat (now Viasat) and Deutsche Telekom. The system uses a combination of ground based LTE and satellite connectivity.

That's the one, thanks!

Sadly most planes still run on legacy systems, it's not something that's ever a priority.

Yes those are awesome