Not sure the first version you're referencing...The biggest features that I've seen proliferate quickly in the past few releases are f-strings and dataclasses.

3.8's walrus operator will probably start popping up more once people calm down about how it looks funny. 3.9 has more minor tweaks and tricks. 3.10 will introduce pattern matching (case/switch statement) that python developers have been begging for (I HAVE NO IDEA WHY!!!???) for near a decade.