Right. The current satellite system aircrafts (United Airlines for sure) have consists of M10s or otherwise D12 receivers with modified commercial software, obviously to limit the amount of control a passenger has over settings. This is a long-old setup and many airplanes either need to be moved to streaming or they need to replace M10/D12 receivers with H24/H25 receivers. Replacing receivers would not be feasible, especially because the in-motion dish attached to planes is only designated for 101, not for 99 and 103. A whole new receiving dish (not even sure if one exists for airplanes to receive 99 and 103) could cost a lot more money and a whole new wiring system.
Clearly, streaming is more feasible.