Overrated beginner mistakes I keep coming back to [v5]

Not sure if this is the right place to ask, mods please remove if it is not. There is a lot of conflicting advice online and most of it is from 2019.

This came up at a meetup recently and the room was split, so curious what the broader community thinks.

I want to write something more comprehensive about this later but starting with a quick post to gather thoughts. I want to write something more comprehensive about this later but starting with a quick post to gather thoughts. Not sure if this is the right place to ask, mods please remove if it is not.