Sony products are known to stand the test of time even their vaio laptops when it was their brand which I have 3 and still use with no hardware issues except internal hard drive which is not manufactured by them.
Although Sony uses most of their components, in their dap market it’s their batteries that are rendering their walkmans useless. I wish they would allow users to replace batteries that are not only easily available but also easy to access.
Heck, I love the WM series walkmans, their UI is just impeccable but in the long run I don’t think the batteries will hold enough charge to make it portable anymore and I’m saying 10 years from now. I don’t need the latest and greatest but I do like and want to keep what I own.
In 10 years from now you may not even be alive. Most probably you will want to upgrade to new tech anyway in few years. I think you worry yoo much