On-prem thankfully is changing quickly. It used to be boutique, every shop kludging together their own plan, cobbling together an assorted mix of vendor and open source. There were few macro patterns.

The major change in the last 10 years is that there's now a very stable & general open-source cloud platform that covers a much wider range of the stack than what we had before, and which has achieved a critical mass of popularity.

On prem is still hard. Having an organization that isn't crufty & slow, where there aren't forms in triplicate & long waits for every request, is still hard. But it's gotten a lot easier than it was to bring up, and to let users do some self service. There's a small scale org where having a small handful of clusters & letting users semi-free, mostly using ci/cd, is quite attainable. Figuring out how to scale up to serving a mid or larger size org is still quite a challenge.