[pdal] Kernel deprecation?

[Howard Butler]

I was wondering what the PDAL user community thinks about some of the PDAL kernels. For a lot of these capabilities, I find myself using simple pipelines or writing more complex logic using the new Python bindings. It is my hypothesis that many of you are doing the same. Specifically, are they being used? If so, what makes them successful for you (or not). 

* chamfer
* delta
* density
* eval
* ground
* hausdorff
* random

If we were to deprecate all of these in the upcoming PDAL 2.6.0 and removed them at PDAL 2.7.0, would you miss them? Which one(s) would you miss in your workflows?

Howard