On 01/12/2020, at 02:24, Mikhail Golubev via Distutils-SIG <distutils-sig@python.org> wrote:

The second question is about the behavior of this option. It appears that we initially started using it because in the past packages were not built in a temporary directory by default. Could you please point me to the exact version of pip where it changed? -- I couldn't find it in a changelog. It would help us decide whether we need to keep some compatibility layer for interpreters with an old version of pip installed.