When there’s opportunity to put replay value into things - IE; timewalking - they just… never gave a real reason for people to go back to it.
Am I really going to run Timewalking Ulduar when literally nothing drops from it that is worth my time? It was one-button soloable for so many years I have all the transmog/pets/mounts from it. Where’s - at minimum - the recolours of gear so I have a reason to go back and do it with my friends?
If it always scales us, that content always retains some sort of relevancy in regards to immersion and feeling of effort.
But na.