Somehow I find myself thinking that we wouldn't care about it anywhere near as much as you do
Yet again we see the entirely-false conflation between "removal of mag-stripe ticketing" and "removal of all physical ticket options".
Saying that the elimination of mag-striping is occurring because it's "old" is an oversimplification. It's occurring because the technology has been superseded by alternatives that are cheaper and easier to deploy and maintain.
You will still be able to buy physical tickets, but sooner or later they will be provided on thermal paper rather than cardstock. This paper is cheaper, can be issued using cheaper printers, and can be read by gates fitted with barcode scanners that are cheaper than mag-stripe mechanisms. This process is already underway for many TOCs that don't issue many tickets involving LU validity, and will accelerate rapidly when LU get up to speed with barcode acceptance.
As to whether or not you will be able to buy them
in person - that's an entirely different matter, as anybody not indulging in silly hyperbole should be able to understand.