Cannot really see the added value for wideangle landscape, perhaps to get just a little longer shutter speeds than SR allows for? But indeed, tripods are better for that because they allow much more.
I do use monopods regularily (sometimes a dedicated one, sometimes a detached leg from tripod, and since shortly a Steadify), but mostly for longer/heavier lenses.
SR does a great job in stabilizing the image taking part, but it does not stabilize the view finder pre exposure. As such having a more stable base can allow more precise composition, which matters for landscape. Also it helps keeping the composition stable between exposures which I find sometimes hard handheld with long lenses. Note that I find exposure bracketing for HDR very useful for landscape, but I also do a lot of stacking/blending of equal exposures for higher resolution (e.g. for more crop than the longest focal length available would normally allow for) or high ISO noise reduction. A tripod is better for exposure bracketing, but slightly less efficient for the latter two since those techniques benefit from slight shifts in framing between exposures (which is exactly what using a monopod results in).
For really heavy glass, a monopod also means I can rest the camera/lens from time to time, giving my arms a little respite... If it wouldn't be for a monopod, I would never be able to use my DFA150-450 on a full day hike.
hth, Wim
Last edited by Ishpuini; 01-07-2019 at 05:33 AM.