"but uses up several more hours per day to do so, so no real benefit in not commuting" - the difference being that you are sat at home and not crammed on a train, paying £5k ++ for the privilege, with the sweating masses and no way out
I know of several very large outfits that have told their staff to plan on a max of 1 day a week in office. And they're cutting their offices down as fast as possible to get the gain on rents. Many say they see a significant GAIN in productivity from people WFH