What kind of companies do you mean? Any that have an impact on the development I do?

>It could have other implications. For example, many companies tie support of their products to what Microsoft supports. "You're running on Windows 2000? We don't support that."
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>>Maybe it's different in the .NET world. With VFP, official Microsoft support has never been much of an issue for me. I don't use it in the first place.