My mother was watching House Hunters

[conuly]

And the couple was raving about how the charming old house they were looking at had "pocket doors" and I'm just - folks, we live in a house with pocket doors, and lots of 'em. Do you know why this feature is so rare? When those doors break - and sooner or later everything breaks! - they are a massive, massive pain to fix. Are you particularly handy? No? Then don't do it.

I just googled this, and they start out by telling you to cut an access hole in the drywall and just no.