They’re not cheap, but they can be resoled (360 euros purchase, 60 euros resoling). The resoling consists in snipping out the worn out sole and attaching new chainmail to the rest of the shoe (done by the manufacturer in Germany - you mail them the shoes).
I’ve had them for years and they’re still going strong. The pads show no signs of quitting (I have the Anterras, which have rubber “paws” - the bare chainmail soles are too slippery on tiles, and too rough on wooden floors). Some heavy users have had theirs for even longer, and resoled them many times.
Having said that, nowadays I don’t wear them much. I just keep them rolled up in my backpack in case I encounter terrain so rough it’ll defeat my own soles, or some store or restaurant wants to throw me out for not wearing shoes - neither of which has happened to me in years.
Right now, just logging into my computer at work. I’m working on other uses, such as opening my van’s backdoors with my foot, starting my car by stepping on the gas pedal, and stopping the engine by lifting my foot off of it. But that’s in the works, as I’m waiting for some hardware to make those things, and I have other projects on my plate.
See here.