Extending the metaphor with this behavior, it'd be like mainly feeding your dog store-bought food, and occasionally lining up a bowl of home-made. It might sometimes eat it, but you wouldn't know.

Not all software is easily dogfoodable.

A funny incident:

There's a git forge called https://ayllu-forge.org/ that they use to develop itself.

`git clone` had broken, and it hadn't been fixed because the developers had already cloned the code.

Yes that might actually help, but I can imagine the cost/benefit analysis being difficult to pull off: the costs are very real, but the benefits are less tangible. To be clear, I don't know of anyone who left because of a bad upgrade. I think a lot of folks just ran like I did, hopping from LTS to LTS after the point release (or only once their LTS was nearing EOL).