What we have there.....
There might be manufactured resource obsoletions, that shut off entire building chains or just shut off single buildings.
Most recent case was with automobiles reported by
@Snofru1 - I simply commented out obsoletions of automobiles and automobiles.
Things like papyrus (map resource) may be obsoleted, but it should be done carefully as to not kill their consumers.
Current manufacturing resources, that obsolete:
Books at Mind Uploading. Engineering School is killed, and it gives valuable
. Some religious buildings also get killed.
Furs at Plastics. We still use furs.
Ivory at Plastics. What about poachers and demand for ivory in Asia?
Saddles at Vertical Flight. Saddles are used in sports and tourism involved with horses.
Scrolls at Personal Computers. This one looks as most legit thing to actually obsolete.
Stone Tools at Iron Working. No issues with obsoleting that.
Tablets (not those electronic ones) at Paper. Like stone tools or scrolls have no economic value, just purely historical.
It appears only this seven of manufactured resources obsolete.