On Thu, Feb 02, 2023 at 10:02:28AM +0200, Eli Zaretskii wrote:

[...]

> What I'm interested in is hearing the _reasons_ why you decided to go
> with the environment variable, because those reasons might be
> important in other uses.  Was it just the convenience, or was it
> something else?

I think one was put forward in the original:

  "one reason is that we need to handle invocations of Emacs deep
   within third party Makefiles."

Cheers
-- 
t