Place I worked many years ago had one.
It got much more use as a regular band saw than using the roll in feature.
Maybe if it were perfectly aligned and had the correct and very good blade it would have been a better saw, but trying to use the roll in, it could never be trusted to cut straight and not grab and throw the blade.
There was just never enough use for it to take the time to set it up properly. And there were those who used it that had no clue what they were doing, could destroy a new blade instantly.
But if you have a need, and the room, they do have potential.