My most recently built camera bodies are between 5 and 7 years old and my oldest is ~30. None are currently showing signs of falling over, which is awesome. They're "behind" in additional tech capabilities but all of them let me set shutter speed, ISO and aperture. All have a way to engage the shutter mechanism. I can focus the lenses manually at the very least and all have lovely sensors (film is a light sensor too). I can engage flash or strobes efficiently. Two bodies can work entirely without batteries. One of those can rock digital or film. They're at the very least reasonably well built from a manufacturing standpoint and a couple will certainly out live me.
All of the above drivel I've written is to suggest that sometimes obsolescence is in the mind. Yes, cameras can stop working from electronics failure or a port connector breaks or a whole host of other things. Cheaper builds will perhaps fall apart more quickly (or not). Sometimes "obsolete" is what we're made to feel when the object we possess doesn't do the latest exciting thing. In a way it's worth pondering that "obsolete" is also a marketing thing (closely related to the tech).
When one is feeling that a device might be obsolete, it's worth remembering what a camera is: a light-proof box onto which you can put a lens to focus light and an image sensor to record the light. The controls you need are for ISO, shutter speed, aperture and to engage the shutter. Everything else is gravy.
EDIT: And lest I sound like a luddite, I should add that I do love tech and especially camera tech.