Luckily most gui toolkits have a way of disabling CSD. For gtk/libadwaita I recommend something like Gradience to generate a theme with corners of your liking.

What’s the difference between opaque and transparent+blur?

⟨On paper the /s looks great!⟩

It’s also used a frightening amount for counter-arguments. Which I personally hat, since it just kills the conversation. Well unless it’s already in deeply opinionated context such as this.

“You shouldn’t eat ice cream with a fork.” “Doch! (I strongly think the previous statement should be true)”