When people mention in industry chains are oiled always never waxed the OCD waxers will say it’s grinding paste. Conspiracy Dave changes the waxed chain weekly. Who could be arsed.
Chains used in industry are probably a completely different model:
Some potentially run in cases / controlled environments with oil baths so contamination isn't an issue.
The necessary down-time per event to remove and refit a chain may cost more than the pasts cost of an oiled chain's shortened lifespan.
Given that a lot of industrial machinery runs constantly for maximum financial efficiency, waxed chains may be non-viable due to the frequency with which they'd need re-treating.
There may be logistical issues in immersive-waxing large chains.