Lots of APKBUILDS depend on python2-dev and python3-dev when py2-setuptools and py3-setuptools is exactly enough.
Lots of packages bring in the whole 42.45MB size python3-dev dependency (not counting its own dependencies) when the 3.3MB py3-setuptools is more than enough.
That is more than 10x increase in disk and bandwidth used when it is not necessary. (not counting the dependencies python3-dev)
Packages that do not build native C extensions can have python2-dev and python3-dev dependency dropped in favor of py2-setuptools and py3-setuptools.
(from redmine: issue id 10352, created on 2019-04-26)