My PXC 450 still going strong as well, I think 7 years now. I have replaced the cushions once and will have to do it the second time soon, but will most likely

My PXC 450 still going strong as well, I think 7 years now. I have replaced the cushions once and will have to do it the second time soon, but will most likely continue using these at least for some years as they just don't seem to break. I have looked into wireless options, but so far I haven't really seen enough benefit to switch. And my worry is that once I switch, I need to get new ones every second year do to headphones just breaking or battery dying. I really don't want to do that, for many obvious reasons. I have also a lot of good higher end headphones that so far I have been able to fix every single obe with manufacturer spare parts when they wore down.