Yes and no. The "feature" is being phased out.
You'll still find them on routes where there is a mix of high & low platforms. However the railroads are investing in converting stations these days into one type or the other. Platforms are being phased into routes that have level boarding access (meaning there is hardly any elevation change between the platform, door entry, and seating area.) In the past to meet ADA requirements stations had manual wheelchair lifts they could move up to the side of the car and hand-crank up the wheelchair; however this causes delays & are harder to implement at non-staffed stations (OBS has to then go fetch the lift and do it themselves once the train get there; @ a staff station, station staff should have the lift there and ready trackside when the train pulls in.)
peter
PS here is a picture of the wheelchair lifts in the "up" position.
https://i.ytimg.com/vi/WKwmGls1Yr0/maxresdefault.jpg
Here is my local station post "conversion"
http://allaboardondepotstreet.com/wp-content/uploads/2015/10/DSCN3132.jpg