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Can you clarify specifically which parts of those are missing from your OpenVZ VPS that you personally need and why?
Again, not saying new kernels aren't better or anything like that, but I still submit that the average user does not know why, in personally applicable terms, they upgrade each kernel. There's nothing wrong with that at all either. You should care about features that impact what you do and fixes for major kernel security flaws, that's it, anything more is someone else's problem
SYNPROXY isn't in 2.6 and it's unknown if they'll virtualize it for OVZ7.
The other things are major performance improvements. 3.x also brought in mpqueue which makes it so Linux's IOPS performance scales with the number of cores you have, assuming your HBA/RAID card supports it.
Francisco
You said it better and I could.
There are still some apps and distros that I use that run on CentOS 5. Running those on my CentOS 6 OVZ gives the app CentOS 6 kernelspace. So you could argue there are advantages in that situation if you believe that a newer kernel version is that important. I have found that it doesn't seem to make that much difference. Certainly doesn't break them. Seems to me the userspace stuff is more important and you get 100% virtualization of that on OVZ. So basically almost all if not all the GNU part of GNU/Linux
I run CE5,6,7. Debian6,7,8. Ubuntu 12,14,16 all on OVZ 2.6.32 kernel. They all just work. Newer security updates are backported. Little things do come up sometimes as new software is introduced like with systemd but it gets fixed and people move on. They are supporting it till 2019 which gives people plenty of time to transition to VZ7 or something else.
The company behind OpenVZ / Virtuzzo is doing it's best to kill it off with a licensing model on the commercial version that negates almost all of it's technical advantages. The biggest draw of OpenVZ which Virtuzzo improves upon, is a very low per-VM overhead. Combine that with a high per-VM license fee and the product is dead in the water for 95%+ of its possible market. For lots of small VMs, where it should be most attractive, it's actually worse than anything else.
You must be confusing it with Virtuozzo 6 which IS a commercial product with its own GUI. OpenVZ is not and I believe VZ 7 is the same idea. Just that they are using the same name now for the two separate products. I think they are calling the unlicenced no GUI one Virtuozzo core or something like that to distinguish it from Virtuozzo commercial.
I believe Solus is planning to support Virtuozzo 7 core so it should be a fairly seamless upgrade path. Looks to me to be ready to use now for non-critical things. I probably won't consider it for production for at least another year.
Remember the challenge KVM vs.OpenVZ?
OpenVZ provides the end-user with speed and scalability, and it’s more affordable (cheaper, in other words). KVM offers private virtualized hardware including network card, disk and graphics adapter, and guaranteed resources for increased reliability and customizability. KVM packages are ideal for serious resellers, game servers, small businesses, and medium-sized enterprises. But, if you are a host selling to your clients, OpenVZ is easier to set-up and maintain properly, while KVM takes much more networking knowledge. OpenVZ and their templates are more beginner friendly in that aspect. If you are simply an end-user, don’t worry and go with a managed hosting provider.