I don't know if this carries any weight to it or not, but in the cong I was just DFd from, there was a "special pioneer" couple in their 60's. I live in a rural community with no need for special pioneers - there just isn't enough people to even preach to. I learned from working in service with them that they had been in Bethel for several decades and then just about 3 years ago, they were told they had a new assignment of being special pioneers. They could pick anywhere they wanted to live. They chose this particular community because that's where they still had family. They would even joke that they had been "sent out to pasture" because they were getting older.
I always thought that while it probably was better for the organization financially, to support two special pioneers with an "allowance" rather than take care of everything for them at Bethel, it was still rather cruel. To go from such a strict way of living with certain amenities to then having to adjust to the "real world".