If languages stop being created, it will be because there won't be a need for them. That's not necessarily a bad thing.
Think of programming languages as you currently think of CPU ISAs. We only need so many of those. And at this point, machine-instruction architecture has diverged so far from traditional ISAs that it no longer gets called that. Instead of x86 and ARM and RISC-V we talk about PTX and SASS and RDNA. Or rather, hardly anyone talks about them, because the interesting stuff happens at a higher level of abstraction.
Think of programming languages as you currently think of CPU ISAs. We only need so many of those. And at this point, machine-instruction architecture has diverged so far from traditional ISAs that it no longer gets called that. Instead of x86 and ARM and RISC-V we talk about PTX and SASS and RDNA. Or rather, hardly anyone talks about them, because the interesting stuff happens at a higher level of abstraction.