In article .com,
says...
THIS is how they build TELEVISIONS!?! Yikes!!! No wonder they go out
of tune so fast and so unpredictably. No wonder I have to re-focus a
brand new Sony that just came in the house!

Focus is a separate issue. There's an electrical control for that.
It can be affected by temperature, humidity, etc.

"Jam rubber wedges"???

Some of the pricey "big CRT" sets have adjustment studs bonded to
the tube, and the yoke pretty much becomes a permanent part of
the CRT. But for anything up through 27", rubber wedges are
pretty much the norm.

"Get loose internally...with age"? It'll get loose just moving it
across the room to where it will be watched!

Some of them do get knocked out of alignment during shipping,
although it takes a pretty good hit when they are new.

Thanks for bringing this up - that's scary!

If you thought that was scary...

Most sets are now designed to last about 5 years, and then the
maker totally abandons support. It's all going to be moot in a
couple of years anyway, if the government has its way. Analog
(NTSC) broadcast has been targeted for termination, and everyone
must buy new (expensive) digital televisions with LCD or plasma
displays. Or maybe there will be set-top converters for folks
who want to extract the last dregs from their old sets.