From a personal perspective, this is a very welcome move by MFC. My Season Card is one of the few things I physically have to carry around these days, but pretty much everything else is on my phone (gig tickets/railcard/train tickets/credit card/banking, etc). Over the past month I have been to Glastonbury and had a weekend in London and spent literally zero cash in the process. I personally find paying for things by Apple Pay more convenient and easier to keep track of what I'm spending (too much usually!).
Not having to wonder where my Season Card is every couple of weeks will be a positive outcome for me, but I appreciate that not everyone is able or willing to adapt to a digital society. I'm sure though that MFC will not exclude anyone and for the minority that can't or won't use the new system, alternatives will be available. But for the growing majority that live their lives via their smartphone, this will be seen as a good move by the club.
I empathise entirely with those that feel anxious about the ever changing world around us, although at the same time I find it mildly ironic that they are using an online platform to express such anxiety.