He tested it by converting Euros to Dollars first, used it for a while and then put Dollars in to the same machine and they were shredded.

He did test but using the wrong mental model.

Why do we have a machine that shreds any dollars? Who anywhere is interested in a dollar shredding feature?

That's the correct question.

The supporters here are saying "yeah, it shreds dollars, he should have known that". And yeah, if you have a machine that shreds dollars, you better know what it does. That's a good reason for not having such a machine.

Anyway, ETH seems to be full of those features where it shreds money on places that are really not obvious and sometimes gets every single person by surprise.

> Why do we have a machine that shreds any dollars?

Fuck knows. No legit reason that I can see; because cryptards are idiots, is the only thing that comes to mind.

> Who anywhere is interested in a dollar shredding feature?

Nobody with the least bit of sense. (But, see above...) That's why he was complaining about it.