Piss, bugger, bum, fart.
I start quite a few posts like that don’t I?
OK, a reminder to everyone why child themes are awesome. A child theme is your own personal CSS that is added on to, and over rules, the theme you are using. If you change part of a theme, next time you update the theme, you lose your changes. Your child theme however remains the same until you change it.
So the smart man adds a child theme to change the page dimensions, element shapes, font families and visual style of a theme. The blithering idiot makes changes direct to the theme.
Guess what blithering idiot is now in a quandary after making dozens of changes to the theme 10 months ago, without a child theme, or noting what they all were, to now see theres a new update waiting for his theme.