[ben_w]

> It's that, but it's not just that: if a QFT in 4-d spacetime has a coupling constant with a negative mass dimension, it has infinitely many free parameters, which means you can only use it below a given energy scale.

Huh.

Do you know of any videos that go into more depth? (My level is the "PBS Space Time" and Sabine Hossenfelder videos as I don't do this professionally).

[nyssos]

No, this is upper level undergrad/introductory graduate material. Popsci is going to be worse than useless.

[ben_w]

Fair enough. I'm definitely not at that level yet, and there's a good chance I'll never find time to reach it.