There be dragons. OS support is either so bad it's not worth the cost, or so good it makes your in-house crew look incompetent and so the advice is thrown out

There be dragons. OS support is either so bad it's not worth the cost, or so good it makes your in-house crew look incompetent and so the advice is thrown out the window in the interest of protecting silos. There could be a market for on-demand support, perhaps. Get a marketplace of engineers with very deep knowledge of a bunch of domains, and price them as 24x7 support for some crazy amount of money. Practical problems in enterprise: on-demand engineers will have 0 access to the client network and won't anytime soon without a full onboarding process, destroying the nature of the "fix this quick" benefit. Spending decisions go up a long and slow tree.