10 Brushes has to be activated in Krita via ‘‘Settings’’ >> ‘‘Configure Krita’’ >> ‘‘Python Plugin Manager’’, there scroll down to its entry and set the checkmark in front of it.
There also exists an extended version of the Ten Brushes plugin, “Twenty Brushes”.
TwentyBrushes on hotkeys
I don’t want to skim through this topic again, but I think @Grum999’s Buli Brush Switch belongs to the Plugins aiming to help here, but it offers much more functions, is a versatile tool.
Buli Brush Switch
Also @EyeOdin’s Eraser Shift plugin seem to aim at the same target.
As well as @Daishishi’s [Proof of Concept] Plugin as Eraser Tool (PET).
The next candidate, JoannesJ’s “Krita Direct Eraser” unfortunately the old KDE-Forum is taken down or was moved to an unknown location, but you can get it from my cloud including copies of the forum pages where it was presented:
Another versatile plugin, what should be of use here is @Lucifer’s Ten Brush Slots I guess.
Ten Brush Slots
And then there are very probably also all those private solutions unknown to me or this forum…
Michelist