I shall hence forth drop the “Boiling Frog” hypothesis for slow subtle changes over time not being recognised by the body and thus not producing pain, to the “Indiana Bell Building” hypothesis. This is why you can see changes on MRI but have no pain, so slow “no one felt it move”
In 1930 the Indiana Bell building was rotated 90° Over a month, the 22 million-pound structure was moved 15 inch/hr while 600 employees still worked there. There wasn’t interruption to gas, heat, electricity, water, sewage, or the phone service. No one inside felt it move.