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.