It won't bother them for a very long time. Enterprise systems and installations rarely follow latest kernels and packages.

CentOS 8 still uses 5.8 for example and will use it for a long time.

I manage such systems and unless something explicitly needs 5.9, we won't upgrade them. If it's working, it's working. Everything is isolated from outside network so, external threats are not very important. We're also an academic installation so, there's nothing sensitive inside.

Edit: This doesn't mean that we won't security-patch our systems. That's done pretty quickly and regularly. It's different.