If this is the first time you've heard about a kernel problem on EC2 you're probably not managing a very large EC2 infrastructure [1, 2]. Even in non-virtualized environments, at scale, it's common to run into linux kernel bugs, or at least peculiarities. Which is why large tech organizations invariably employ kernel dev teams.

The guy who claimed EC2 kernels are linked to the distro you run was simply claiming that, unless you want to go it on your own, you're tied to the kernel provided by a supported AMI. As you've suggested multiple times, there are benefits to running an environment that is supported and that other people have operational experience with. Honestly, I'm not even sure what you're arguing anymore... seems like you're just being antagonistic.

[1] https://bugs.launchpad.net/ubuntu/+source/linux-ec2/ [2] https://bugs.launchpad.net/ubuntu/+source/linux/+bugs?field....