As an aside, this has been a big deal for the ceramics industry, which uses talc in the production of clay bodies as well as glazes (think tile manufacturing -- DalTile uses so much talc that they recently bought their own mine to secure their supply).
Talc is an excellent material[1] that has been in use for decades, but its availability to the public has typically been driven by the demands of mining done on behalf of cosmetic industries. Since these lawsuits began and the talc supply dried up, ceramic industry has been scrambling for the past ~3 years to find alternatives with similar chemistry and working properties.
The network effects of industry and mining are pretty interesting (and frustrating to hobbyists, when your favorite materials disappear!).