This is basically a build vs buy discussion. Businesses have generally concluded they should only build things that give them a strategic advantage and buy other services to maintain focus on their sources of competitive advantage. Eg in the case of k8s, it's not just spinning it up, it's securing it, patching, monitoring, etc. It's for this reason the majority of orgs shouldn't run it themselves.
However some balance is needed. Orgs may want to do exploration since it may not be obvious where competitive advantage can come from, or like you say perhaps hybrid makes sense, using it only in non prod.
However some balance is needed. Orgs may want to do exploration since it may not be obvious where competitive advantage can come from, or like you say perhaps hybrid makes sense, using it only in non prod.