Dear WeatherCat sys-admins with upgrade misgivings,
Other World Computing has a timely article on how you might still be able to revert back to an earlier version of macOS if the present bug situation in High Sierra has exceeded your comfort level (or if you would like to get Sylvester working again once more.) The article is here:
https://blog.macsales.com/43001-macos-reversion-how-to-downgrade-from-high-sierraIt is an extreme measure, but alas, extreme times (or should I say bugs
) might demand extreme measures. . . . . . . .
Cheers, Edouard