Was messing around with MC-178889 and MC-178899. I expanded the resourcepack to cover a few more similar blocks.
This may be intentional as chains inherit the block.json and the vines inherit cross.json. Vines are more similar to tall grass than chains from a model point of view. Dripstone having several different sizes may also disallow culling. I could also be using the pack incorrectly.
Basically the lack of culling will only affect resourcepacks which add custom models to these blocks.

Second picture I am even less certain about as they appear to cull, but not according to the pack except for where they touch full blocks (image 3).
Affects Kelp, Sugar Cane, Nether Portal.

Also affects End Gateways which are full blocks. Easy to test, just fly into one as a spectator. Impossible to recreate in survival as they only generate as single blocks. They use the same model as End portals so I assume it would affects End portals which are created in groups. Pack does not work for End Portals.