I know I would pressure my job to eliminate travel, much as I enjoy having subsidized flying from them.

Leisure trips that were drivable would go away.

I would also no longer make MRs. And no long-distance trips that are for less than a week in duration (i.e. no three or four-day weekends on transcons, etc.)

Unfortunately, there will be plenty of Ma and Pa Kettles who simply walk down the well-traveled corridors into the valley of steel like the sheep they are and who will complain but say, "Well, at least it makes us safe."