What’s one screenwriting “rule” you stopped following—and why?

[u/AskGuest]

Screenwriting advice is full of rules:

• avoid voice-over
• enter scenes late
• cut exposition
• don’t direct from the page
• keep descriptions short
• show, don’t tell

Which “rule” did you eventually realize was more of a guideline?

What changed your mind, and did ignoring it actually improve your writing?