I really miss the shift snap option from other apps

Holding shift snaps to straight line in 0°, 45° and 90°
I miss this feature extremely and would love to see it in Krita

I use a perspective assistant for that when I really need it.

On a new layer I paint 1 square.
Duplicate layer, rotate 45°
Resize to the desired space.
Using the perspective assistant, make 2 grids matching the points on each square.
Hide assistants (I belive is, View > hide assistant
On brush options select "Assistant" and set to 1000.

With a setup like this I barely miss shift snap as you can make any type of angled snap, or perspective snap.

The only missing thing is a toggle button to make it faster to use assistants

Hope it works for you.

Yes... That's a good way to work. But we should fix our tools to have shift-snap as well, it's something that's been on the todo for over six years now!

That's a long time now!
Would be nice if the snap angles could be set/modified on a document session.

Good to know it's "in the oven"

would be wonderful. pretty much the only thing i miss ^^