I have not worked any of the newer systems, but here are my experiences:
Delta: worked the Rockwell collins system on the 767. It's common for the interactive portion to go inop. However there is manual back up where the video tapes are inserted and the system does operate with some limitation. Seat display units (vdu's du's etc) were reliable as were the seb's.
Did have some exposure to the panasonic ife (ex song). Linux based but just as unreliable as the collins NT
based system. Though not as bad as a linux cold boot was 2x quicker than NT
. VDU's and SEB's seemed to have good reliability (not too sure as it was a panasonic mx function) .
Rockwell Collins: Worked primarily AA
777's. Basically the same as delta's 767 ife. Not many issues, nothing a cold reboot couldn't help.
Jetblue: aweful, numerous failures. VDU's flipping out, SEB's frying, antennas going bad. Aweful DOS...that's right DOS based system. That combined with a nasty interior..yuck. Aweful quality.
The views and opinions written here are my own and do not reflect those of my employer.