15 years is too long, it doesn’t match the state of the industry or technological progress.

How is this too long? I would consider it a reasonable amount of time to receive security updates on a computer.

I have a notebook that I bought in 2012. It can run Ubuntu LTS 24.04, which is supported until 2034, without issue. There is no indication that the next release will stop supporting this hardware. I don’t see why Microsoft couldn’t provide this.