Python's performance problems are unfixable without wholesale redesign of the language and standard library. Its package management is a bad joke. The developers give no indication that they have any intention to fix those problems, rather than keep stuffing more unnecessary and badly thought-out features into it.
Obsolescence should be gauged by how modern the design of a language is, rather than its popularity. By that measure, Python is manifestly obsolete, and has been even when it debuted.