Does your work pay for enterprise support? https://buy.ubuntu.com/
You should be clear about what you mean by support as you seem to use it interchangeably between meaning that the OS has a lot of software and the ability to get some kind of technical knowledge for issues.
In most cases, enterprise support would include support for software, at minimum it will include support for all software distributed by the supplier. Remember that the “OS” in this sense isn’t just the Linux kernel and grub to boot it.
Your software bugs can in most cases also be helped by paid support if you wanted it to. But even then, your kernel panic you had. Do you have a kernel developer on staff?
If so, I assume they fixed the kernel and send it upstream? If not, you could have used that paid support to get the technical help to fix that kernel bug for you. (just as an example)
Linux has always had a mix. In reality a lot of companies will run a mix of professionally vendor supported systems and company only supported systems.
For example, many pieces of work would run test and low risk systems with CentOS and run production systems with RHEL as while your admins will fix 90% of problems without much issues the knowledge base and specialist help is there when needed for that other 10%.
Smaller companies might get away with just running things without any support, usually its to save money rather than them not needing it. Hopefully you’ve got an admin good enough to not need the specialist help, and to have the right contacts when an fucked up issues shows up that’s not on ask.ubuntu with 10 different wrong solutions.
It really depends on your needs, I think bother are going no where and both are required for Linux to survive.
edit: Good use of paid support for Ubuntu for example is if your company requires further support for Ubuntu 12.04 which has 2 years extended security maintenance under their “Ubuntu Advantage”