[TUHS] Current Status of AT&T/USL Licensing?

So System V shops had to hold a license with AT&T to modify and redistribute code based on UNIX System V and they would then license directly with their customers correct? This being distinct from the way licensing with BSD was concerned in that you had to pursue the license with AT&T to then use BSD. That is my current understanding anyway that I base this question on. So IBM, DEC, Sun, HP, Microsoft, etc. approach AT&T, got a source license, and started producing their System V value adds out there in the world. In this present day and age, for those still shipping genuine System V derivatives, what does this licensing landscape actually look like? Do the players still in the game still refer to whatever license they started with back in the 80s, did they renew up until say SVR4 when folks stopped drinking from the USL well, or are there still ongoing licenses that the remaining vendors have to renew to distribute their software? Where I'm going with this is just another angle on the whole "who owns System V" question which comes up in my mind all the time. Knowing the specific legal entities involved in the most recent licensing documentation would certainly factor into understanding the landscape a little better. To boil that down to a specific example, once upon a time, Sun held a license with AT&T to use, modify, and redistribute UNIX System V. At the present moment, Oracle is the distributor of Solaris. If there is a piece of licensing paperwork sitting in a filing cabinet at Oracle somewhere, who would that paperwork say is the original licensor of the product? Would that even matter in this year of 2025? - Matt G.