I would think the gates are not airline specific due to flexibility for when things go wrong such as aircraft docking requirements not working. Currently they s

I would think the gates are not airline specific due to flexibility for when things go wrong such as aircraft docking requirements not working. Currently they simply change the gate. Therefore this "Comfortability" issue would need to be a Airport expenditure and would have to be rolled out across the entire airport. Not sure all airports will want their landing rates increased for this reason as not all are on the same rates or sizes / no gates etc. The other problem is the more comfortable the waiting area chairs are the more uncomfortable the aircraft will feel when they eventually board.