I use it 100% of the time when the rules of traffic prompts me to use it.
Within a small single-lane housing area: I blink.
When exiting my driveway and the road reaches a dead end 100 meters in the one direction, so it should be very obvious which way I'll go: I blink.
The roundabout in town which is so tiny that it looks more like an intersection, and when heading straight through it: I blink.
It's so much better to have a habit of blinking and making unambiguous signals than to forget it. It helps with the flow of traffic and probably lets everyone get where they need to go quicker.
The tile placement game in Satisfactory is worth a mention. I never fully understood the points system, so I never really rode the game to decent scores, but it was a fun break from the vast size of the rest of the game.