Being from the US, I never really understood why fruit machines aren't just called slot machines and why I never saw any of the ones from the UK in the US. Most people here probably already know this history, but I couldn't find it here, and I didn't know...
https://www.slotsracer.com/blog/the-history-of-the-fruit-machine
Specifically, this part:
and this:
https://www.bestuscasinos.org/blog/the-rise-and-fall-of-fruit-machines/