If you can't understand how the expense of doing that may be onerous on a business then you shouldn't be let anywhere near decision making.
They can continue using 20 year old compilers and quit making the language worse for the rest of us who have put in the effort and cost of writing modern software.
In fact, one of the red flags for decision makers is the inability to understand the above tenet.
I'm glad we managed to get that out of the way.
Companies that wish to stick with their existing and deprecated coding standards can stick to their existing and deprecated compilers, allowing those of is who wish to have safe and modern tools the freedom to make progress without their baggage holding us back.
This is most definitely the paragon that should be helping us decide which large swathe of people to fuck over.