Here you go: https://www.bike24.com/p2232474.html

You and I didn't write about support or lack thereof. We were discussing parts availability, repairability and so on. Shimano is not repairable. It doesn't matter how good their support is. They can offer you a new brake caliper but they will not offer you a piston as a part. These ARE disposable items.

You are correct. But it is customer who is to blame. People are throwing things out nowadays way sooner than it is necessary. A new bike every 2 years. That's why they did some math and it came out that they can introduce "lifetime" warranty.

The subject is very complex. It is a dynamic relation between producers and customers. Shimano for example makes great gear but their disc brakes are absolutely not serviceable. You cannot replace a piston there. And yet still people are buying their brakes. And not Formula or Hope or even Sram where you can replace every part after more than 10 years of usage. People are lazy and prone to consume in not very clever way. Crowd follows crowd.