To be clear in the Wayland fetishists fantasies they wouldn't need to convince people to all switch to wayland circumstances would foreclose on any further debate in reality all players have an incentive to keep existing software working.
If one calls the _ syscall with parameters a b and c it won't suddenly require a 4th or demand they be in a c b order is literally what makes X11 continue working against newer kernels. Providing new functionality wherein if you don't call foo before calling _ with a b and c it fails to perform its function would be functionally the same as changing the order of parameters it would be breaking user space.
I don't see how you could possibly lawyer yourself past that, I don't see that the adults in the room who have to support customers in rhel 8 through 2029 can do anything but keep doing minimum work to keep x and the kernel playing nicely. I don't see how nvidia is going to go from supporting hardware for 10-18 years even on niche hardware to dropping support for X so quickly. I also don't see how you can meaningfully talk about the kernel dropping support for X without basing your discussion on actual kernel developers who logically would talk about kernel foo will be the last to support X probably years before it actually happens. I'm totally sure that python 2 -> 3 took over a decade after it was a completely suitable replacement but we will totally manage to replace X before its replacement is fully baked and the kinks worked out.
In short the whole premise is completely and totally premature wishful thinking by people who want their own way. I'll pour one out for X when its actually and in fact dead.
If one calls the _ syscall with parameters a b and c it won't suddenly require a 4th or demand they be in a c b order is literally what makes X11 continue working against newer kernels. Providing new functionality wherein if you don't call foo before calling _ with a b and c it fails to perform its function would be functionally the same as changing the order of parameters it would be breaking user space.
I don't see how you could possibly lawyer yourself past that, I don't see that the adults in the room who have to support customers in rhel 8 through 2029 can do anything but keep doing minimum work to keep x and the kernel playing nicely. I don't see how nvidia is going to go from supporting hardware for 10-18 years even on niche hardware to dropping support for X so quickly. I also don't see how you can meaningfully talk about the kernel dropping support for X without basing your discussion on actual kernel developers who logically would talk about kernel foo will be the last to support X probably years before it actually happens. I'm totally sure that python 2 -> 3 took over a decade after it was a completely suitable replacement but we will totally manage to replace X before its replacement is fully baked and the kinks worked out.
In short the whole premise is completely and totally premature wishful thinking by people who want their own way. I'll pour one out for X when its actually and in fact dead.