With our current engineering capabilities, our machines could easily be designed and built to last several hundred years, needing only the most trivial maintenance along the way. And with redundancies enough that they would remain in service when that maintenance became necessary.
Planned obsolescence is, to use the Victorian phrase, a humbug.
(Victorians seemingly believed in endless and continual progress. With a long 'o.' I miss them.)
Duly noting that communism and socialism and G-d forbid fascism and every other known -ism are far worse before I say it--
Such is the downside and terrible cost of capitalism and its overwhelming focus on profit above all else--
That we don't do much of anything as well and ably as we ought, and can.