tilt shif lens

Are Tilt shift lenses still needed in Landscape Photography?  I've mainly used the tilt for DOF.  With focus stacking, unless things are moving, I'm not sure that is necessary.  I guess the shift can still be used to prevent tilting trees.

Purely for extending DOF--with the caveat about dealing with moving objects when using focus stacking, as you noted--no, the T-S lens isn't needed.  In fact, one of the advantages of stacking compared to a single shot with a tilt-shift lens--is that, technically, you're not broadly extending the DOF plane with a T-S lens, you're tilting it.  This was fine when the objects you want to keep in focus are in a narrow vertical range, but when you have objects that are filling the frame in terms of height, the T-S lens can't do what you want.  Focus stacking has no such limitation. 

Images like the two I'm linking here are good examples of the kinds of images that wouldn't have been aided by use of a T-S lens (I used focus stacking for them).

https://www.lightscapesphotography.com/p209358077/hce31a15#hce31a15

https://www.lightscapesphotography.com/p209358077/h6ce4fcce#h6ce4fcce

If I were a full time real estate photographer, I'd buy one if I could afford the set up. Camera labs just did a video on tilt shift. Very interesting.Tilt Shift

I like my tilt and shift lens at the coast, where the movement of the sea makes focus stacking impractical.

As long as there's nothing tall in the foreground, the plane of focus can be tilted to get what I want in focus.