Really the problem for the railways is not so much will commuting ever return to the pre covid level, it won't, the WFH genie is well and truly out of the bottle, but where will it settle. Everyone has their own theory, mine is that where we are are now is pretty well where it is going to continue. Companies are finding it difficult to get people to spend potentially 100s or even 1000s of pounds and hours to commute into an office to do a job they can do equally well without commuting. The current you must attend the office 2 or 3 days a week is already being eroded, as companies realise that they can save money by reducing office space, and trips to the office become much more to do with face 2 face meetings or hands on work which needs a physical presence. Thats certainly the way my work goes. I negotiated a WFH 100% unless needed physically in place of a rate increase this year, saves me money and time, saves them money, we both come out ahead. I must be one of a growing band.
My view is the railways need to move away from the peak/off peak model, its not going to work. Then a political decision, do you try and squeeze the same revenue out the current usage, or not. One thing the railways need to understand and quickly is that lesiure travellers have more choices both of mode and and even if they undertake the journey in the first place.
I think the next 12 months or so will be critical. what ever the political complexion governments are going to need to have to come to terms with the question 'How do you fund the railways'