So is it acceptable to miss the folders and also understand why we don’t need them anymore?

I only use my iPhone boarding pass now, but I’m (just) old enough to remember when multiple copies of the ticket—with all the connecting flights, to be torn out by the respective agents along your journey—were stapled into the folder. And then you stuck what was left into the inside pocket of your blazer.

I also miss the blazers but I guess I understand why we don’t need those for travel either …