Qualcomm is (likely) ARM's biggest customer. I don't think either party wants the product line to be abandoned. They are arguing over royalties.

Same thing happened with Apple (https://www.apple.com/newsroom/2019/04/qualcomm-and-apple-ag...), with Apple planning to replace Qualcomm's modems in their iPhone SE in the spring after 6 years of engineering: https://www.bloomberg.com/news/newsletters/2024-08-18/why-is...

I'm sure that everyone is excited to switch to RISC-V, so maybe Qualcomm accelerates those plans.