Python, judged against JS, is almost sedate in its evolution.
It would be nice if a combination of language, libraries, and coding orthodoxy remained stable for more than a few years, but that's just not the technology landscape in which we work. Thanks, Internet.
Python was explicitly designed and had a dedicated BDFL for the vast majority of its nearly 30 year history functioning as a standards body.
JS, on the other hand, was hacked together in a week in the mid-90s and then the baseline implementation that could be relied on was emergent behavior at best, anarchy at worst for 15 years.