I was listening to Shilao and Yankeesama discussion from last week and their discussion about H-6 is quite interesting. I get the sense that PLA really likes H-6K/J. I am a big fan of the program too. They made the point that H-6K is much better for PLAAF's need than if they had imported Tu-22M. Tu-22M carrying 4 YJ-12s probably would not be able to go supersonic (not sure if this is true). But one thing is for sure, H-6K with that much payload will have longer range Tu-22M with similar payload. PLAAF has well over 100 H-6Ks and they can all carry 4 YJ-12s. Even more surprisingly, they mentioned that there is now a replacement for YJ-12. We have not seen pictures of it due to opsec reasons. It will be really interesting for me to find out where this new missile may improve over YJ-12.
H-6 series is likely to be in service for a while.