Earlier quoted context omitted.
I doubt any would describe my voice as "loud", but I suspect I fall into the 0.01% you mention. I sell code (programming libraries, and commercial business systems) which have been under continual development sint 1996. So 27 years. Copyright in this context would be complicated in a "20 year" model. Last month saw a significant upgrade to a product first released in 2000. Should the 2K version be public domain now?…
Would you be restricted/harmed if the version from 2000 was public domain by now? How?
Market-wise I could see a fair bit of confusion as an old (now public domain) version floats around with the same name (but different version number) to the commercial version.
Of course this is likely immaterial anyway. Unless someone bothered to archive the version at the time, that version no longer exists. We can date it (from the release notes) but I no longer have that build in the archive.
So maybe my wariness is unfounded.