I don't interpret "pulling free CentOS images" as being the same thing as "pulling investment in CentOS" in a thread specifically about docker images.
Existing docker images are still there, future images will continue being pushed (but only for CentOS Stream post-2021), and UBI exists for minor releases of RHEL which is supposed to be identical to CentOS anyways.
And considering the fact that Docker containers don't use the kernel provided by the client OS, the difference between CentOS and CentOS Stream is even smaller than it already was. The most significant changes between minor releases of RHEL / CentOS are in the kernel.
Existing docker images are still there, future images will continue being pushed (but only for CentOS Stream post-2021), and UBI exists for minor releases of RHEL which is supposed to be identical to CentOS anyways.
And considering the fact that Docker containers don't use the kernel provided by the client OS, the difference between CentOS and CentOS Stream is even smaller than it already was. The most significant changes between minor releases of RHEL / CentOS are in the kernel.