HP was a great company, and released HP48 ROMs into community curated public license at the end of the product life-cycle. To this day I measure every company by that decision to support customers when the company moves on to bigger and better projects.

For many years, Apple also had phenomenal customer support years after a sale. OS 7.5.3 could be installed decades after the product EOL.

Sony DRM just became Tying with extra steps, as consumers now rarely own what they pay for... especially on upgrades. With the loss of physical media, proof of sale and preserved license terms are now ephemeral. =3

https://en.wikipedia.org/wiki/Tying_(commerce)