Oracle is killing Solaris. At least HP has a recent precedent with licensing the rights to another OS (VMS) to a separate company to let its life continue.
https://en.wikipedia.org/wiki/OpenVMS
And I doubt that HP/UX was 5,000 people within HP.
https://en.wikipedia.org/wiki/OpenVMS
And I doubt that HP/UX was 5,000 people within HP.