JW wrote:
Here's one I haven't seen before.

See what comes from living right, kids? 8-)

there were two 22K 2W carbon comp resistors[...]used as bleeders
[...]Both had changed resistance -
one was about 2K, the other was 150 ohms!
I've seen carbon comps drift, but never saw ones that drifted *that* far.

Count yourself lucky up to that point.

[...]they usually drift high; at least in my experience...

Wirewounds and films age upwards;
carbon comps are a crapshoot.

If you had a dissipation task with outrageous peaks,
carbon comps were a useful option;
they took abuse[1] and mostly just smiled when others would fail.
Otherwise, as this shows, they were not a great choice.
..
..
[1] All that comes close these days is those thick film jobs.