Not sure either... but... my 0.02
IMO there are two major things in kernel 6.6 that may have a measurable impact here:
- new scheduler: EEVDF replaces CFS. This is the kernel logic that allocates time to running processes. Should result in better kernel task management so less process latency. Now, as for that translating tangibly to network latency or throughput, it may be a stretch.
- In kernel SMB server. This could mean much more efficient file sharing for anyone using the router as a NAS. Kernel size can be a problem, so might not be included by default in OpenWrt images.
Then we have updates to drivers all over but at this point I would imagine everything is being backported to 6.1.
New is always exciting, regardless. A lot of work goes into every new LTS kernel. Hopefully it results in measurable improvements.