The problem you point out has been known in the Linux community for literally decades and is the reason why Red Hat Linux was created and any company can, right know, get an Enterprise version of it with an Enterprise support contract.
That said, over the years I worked in seriously large multinational companies which used Linux and other open source products like Apache extensively on the server side (pretty much all such machines had it) so at least on the server side things did change massively from back in the day when companies would get Sun servers with SunOS or IBM server with Minix rather than generic server PCs with Linux due to that rationale you stated.
In fact, it has also become a common thing in much smaller companies, though maybe not the small and micro-sized ones.
The reality on the ground at least on the server side and for infrastructure software is that companies did find a way to deal with the problem of not being able to get support contracts from many of the OSS apps makers, and did so either by just paying some company specialized in supporting it or by having their own developers - after all, it’s exactly the thing with OSS that any developer can change it hence you’re not limited to paying for support from a specific company that makes the software.
The problem you point out has been known in the Linux community for literally decades and is the reason why Red Hat Linux was created and any company can, right know, get an Enterprise version of it with an Enterprise support contract.
That said, over the years I worked in seriously large multinational companies which used Linux and other open source products like Apache extensively on the server side (pretty much all such machines had it) so at least on the server side things did change massively from back in the day when companies would get Sun servers with SunOS or IBM server with Minix rather than generic server PCs with Linux due to that rationale you stated.
In fact, it has also become a common thing in much smaller companies, though maybe not the small and micro-sized ones.
The reality on the ground at least on the server side and for infrastructure software is that companies did find a way to deal with the problem of not being able to get support contracts from many of the OSS apps makers, and did so either by just paying some company specialized in supporting it or by having their own developers - after all, it’s exactly the thing with OSS that any developer can change it hence you’re not limited to paying for support from a specific company that makes the software.