[Rd] Update on rtools4 and ucrt support

[jan Vitek]

Hi Jeroen,

I mostly lurk on this list, but I was struck by your combative tone.

To pick on two random bits:
 
> … a 6gb tarball with manually built things on his personal machine…

> … a black-box system that is so opaque and complex that only one person
> knows how it works, and would make it much more difficult for
> students, universities, and other organisations to build R packages
> and libraries on Windows…


Tomas’ tool chain isn't a blackbox, it has copious documentation (see [1]) 
and builds on any machine thanks to the provided docker container.

This is not to criticise your work which has its unique strengths, but to
state the obvious: these strengths are best discussed without passion 
based on factually accurate descriptions.


[1] https://developer.r-project.org/Blog/public/2021/03/12/windows/utf-8-toolchain-and-cran-package-checks/index.html


-jan

Jan Vitek, Professor 
Northeastern University