[cat-dev-null]

Opt-in, like optional security, rarely gets used.

[sqldba]

That's not a user problem.

[cat-dev-null]

It most certainly is if support is focused on the wrong packages and features because they don't have the data to make informed decisions.

[nerdponx]

By that logic, CPython should track usage stats too.

[masklinn]

It does to a very limited extent, in that pypi collects downloads statistics.