That's been well known for over 50 years, why do you think now, all of a sudden, this is becoming an issue now ? This is because there are new coatings, silicon based PTFE-free coatings and PTFE-based metamaterial that combine titanium, ceramic and/or PCD.
As the manufacturer invest in this new technology, they either restrict PTFE commodity manufacturers out of their market or merely stop funding lobbying that protects the PTFE.
This is not a conspiracy theory, simple emergent interests that do not require a coordination.