I found out that my MacBook Pro 2019 runs way faster if I close the lid when using an external screen - 2.7GHz (base 2.4+turbo) vs ~1.5 GHz due to thermal throttling.
I would have never even thought to try this. I keep my lid open, not to use the second screen, but because of Touch ID. However, I'm wearing the Apple Watch again (after years of not) and I can unlock my MBP with that. Also, my password for my MBP is pretty simple to type (shhh!).
/via Michael Tsai.