CRTs do not have a hard lifespan of 10 years.
My dad bought a MagnaVox 23" TV, brand new, for the living room for Christmas of 1990. It even had the fake wood paneling shit on the sides and top. And I distinctly remember watching nightly coverage of Operation Desert Storm on it. We had that TV and it kept working and I used it as a spare TV/guest room addition up until around 2007. (I can't remember when, but it was the mid-2000s)
And it got... tons of use. This wasn't just a TV that was barely on. It was constantly on and used for much of its life.
Now I will admit by the early 2000s that the cathode ray tube was not putting out the picture quality when it was brand new, but it wasn't like it was a pixelated and washed out mess. You could still watch TV on it.