Every circling approach.
These can be done even in simulators without continuous FOV visuals (with certain constraints relating to scene content). Many FAA Level C sims still have monitor visuals and can be qualified for circling approaches. What percentage of sim time does this exercise represent? Does that justify the significant extra cost?
Extending 150 degree visual displays to 180 is achievable cost effectively. A 200 degree requirement (imposed without any real industry-wide discussion and exceeding current FAA and EASA requirements) requires additional visual channels and projectors as well as a new mirror and back-projection screen. It can be achieved but should it be a
requirement for all new simulators?