The ARSC Guide to Audio Preservation, 2015 (https://www.clir.org/wp-content/uploads/sites/6/pub164.pdf) commissioned for and sponsored by the National Recording Preservation Board of the Library of Congress, states: “Vinyl discs are the most stable physical sound recording format developed to date; they can last 100 years in a controlled environment.” History will probably show >100 years.
The RCA record composition developed (early 1970's) for quadrasonic play with a Shibata stylus (RCA Engineer Magazine, 1976, Issue
02-03, Development of Compound for Quadradiscs, by G.A. Bogantz S.K. Khanna 1976-02-03.pdf (worldradiohistory.com)) at 1.5 gram after 100 plays showed little or no wear. They did show clean-narrow trenching with a Conical stylus at 4.5 grams after 100 plays, but a Shibata or equivalent stylus shape would bridge the trench and playback with full fidelity.
We should hope that current record compositions follow what RCA developed which is open source info they detailed in their patent - RCA Patent 3,960,790, June 1, 1976, DISC RECORD AND METHOD OF COMPOUNDING DISC RECORD COMPOSITION 1498409551006799538-03960790 (storage.googleapis.com)
The RCA record composition developed (early 1970's) for quadrasonic play with a Shibata stylus (RCA Engineer Magazine, 1976, Issue
02-03, Development of Compound for Quadradiscs, by G.A. Bogantz S.K. Khanna 1976-02-03.pdf (worldradiohistory.com)) at 1.5 gram after 100 plays showed little or no wear. They did show clean-narrow trenching with a Conical stylus at 4.5 grams after 100 plays, but a Shibata or equivalent stylus shape would bridge the trench and playback with full fidelity.
We should hope that current record compositions follow what RCA developed which is open source info they detailed in their patent - RCA Patent 3,960,790, June 1, 1976, DISC RECORD AND METHOD OF COMPOUNDING DISC RECORD COMPOSITION 1498409551006799538-03960790 (storage.googleapis.com)