My Bernina WF broke because it got bent. Yes parts do wear out and sometimes need replacing in the foot. But, this is rare. The parts are available through your dealer, so it can be fixed. I wasn't happy that my $150 foot was ruined. Not happy at all! It could have been repaired and parts ordered, but it wasn't going to be cheap so I bought a new one. Now, at least I have one for spare parts if the other one ever gets damaged: