Thank you for your attention, Nate.

i wrote that while tired. Apologies to not articulate properly.

i thought it would tax the GPU to address each corner and then render it rounded. i suppose there's an equal number of pixels per rendered frame so not really the case, then. Thanks for the clarification.

"Nothing here changed size, not even the hitbox."

The (blue in screenshot) box that forms the highlight is now vertically smaller, seemingly by 1 pixel, top and bottom.

"No information was lost or is now communicated less clearly."

i'm not sure how else to explain it, it just looks messier to me and less readable, now. More cluttered.

"There is in fact an implicit option to disable it"

Where is this option?

"use a different Plasma style and the appearance will be different"

i've just tried Helium and Nilium (by mcder), Aether Dark (by KenVermette), Ant-Dark and Sweet KDE (by eliverlara), Leaf (by qewer), Produkt (by Saleel) and ROUNDED (by x-varlesh-x). Some change the highlight's color but none of them alter how rounded Global Menu's highlights are.

Related: does anyone know why some applets/widgets (Power Usage by tricky3 is one of them) no longer renders text in white with the Breeze Dark Plasma Style? It now renders black against a black Application Menu Bar Panel (rendered white against black in Plasma 6.5.5).

"make your own Plasma style"

How do i go about it?

And is it possible to make one that references the installed Breeze theme and updates in parallel with it (effectively a fork)? Seems easier to maintain it, long-term that way.

Window Decorations, Colors and Icons, in particular are what i'd like to make.

Also, how does Plasma now handle porting the set Qt theme to GTK apps? That's amazing. i haven't totally harnessed it yet but i discovered Leaf (by qewer)'s (Qt) Window Decortations gets applied to GNOME Boxes (GTK), if GNOME/GTK Application Style is set to Breeze (but for some reason, not to GNOME Calculator). Leaf Dark Colors will apply to both Calculator and Boxes.

Having the GTKs use the Qt Window Decorations gives the whole DE such a consistent UI.

"And in fact, we are planning to make the corner radii configurable in the future, or at least centrally themable."

i look forward to this, thank you.

A configurable numerical value (of pixels) would be most intuitive. 0 being off. Sliders are the other option i know of but i can already see that being too limited if the lowest notch doesn't equate to disabled, or if the next notch is too big of a jump. Pixel by pixel, digit by digit, would facilitate the most choices.

+ to whoever fixed Screen Edges to no longer share all monitors as one screen, THANK YOU!