Interesting, as I don't believe Stadler or SBB share that view.
Seems bizarre to spend all that money on level boarding when a ramp needs to be put down for many wheelchairs.
It's always going to vary based on the consistency of the platform. Yes, you can go to a station and Switzerland and look down a platform with an SBB FLIRT standing there with all the gap fillers aligned precisely with platform level, which means that they do serve as ramps for wheelchairs and strollers and the like, but I don't recall seeing anything saying that the ordinary gap fillers could serve as actual "ramps" in the way we think of that term to mean "a means of traversing a difference in floor heights". Indeed, I've always understood "level boarding" as simply meaning the maximum practical reduction in height difference between the platform and the train's floor, and thus the best-efforts elimination of the need to step up or down when boarding or disembarking. The gap fillers then compliment this by shortening the
length of step required to board or disembark. This is hugely helpful for passengers with mobility limitations, young children, etc etc, but neither of these things have, in my mind, ever been meant as an automatic and unqualified promise of wheelchair access at all doors.
Observe the difference even at this station in Geneva:
(
RABe 522 at Gare Cornavin, by Remontees via Wikimedia Commons)
Now, those are pretty damn close, but even still there's a subtle difference in height for which they can't adjust. Have a look at the
maximum resolution version if you wish.
This example on a Bombardier Talent 2 in Germany is a little more obvious - if the platforms height doesn't correspond with the floor height, they are patently useless as ramps but still of value as steps:
(
Br 422 at Dresden Hbf, by Hoff1980 via Wikimedia Commons)
Stadler themselves describe them as "sliding steps" in both the
December 2016 and
September 2022 datasheets for the 777s.
The 2016 sheet also includes the line "The low-floor vehicle solution combined with standardised platforms offers level entrance throughout the network", but the only mention of wheelchairs in either is in the fact that the units have wheelchair spaces.