>>16764878
>I guess this means China's transition to cryogenics is soon about to be complete?*
Eh, if you look at the past year 6A and 8 have almost exclusively been used for constellation launches with requirements that exceed the capabilities of CZ2C/2D/4B/C, of the two exceptions on 6A, one (Yaogan 40-02) very likely, since they used the extended fairing like on 40-01 needed 6A's capabilities anyway.
The use of CZ2D/4 series follows the same slow downward trend of the past years so far this year, CZ-2C was much less used this year (once vs average of 4-6 in Jan-Aug of previous years so far), IMO it's possibly because PIESAT/Hongtu ordered 8 of them but reportedly failed to pay/deliver sats and this fucked the schedule up.

We haven't seen Monocore CZ-8A and CZ-6C pick up payloads previously typically launched on CZ2/4 series, if anything it's the private and mixed ownership commercial launchers that did, especially Jielong/Kinetica, and to lesser extent Zhuque, Ceres, KZ-11
There are still occasional improvements for CZ2/4 and they're still commercially advertised, I don't really expect them to be replaced until the end of the decade. And CZ-3B will likely keep flying into the early 30s.