I suppose if it works for you, that's great.

But I find even an M4 will lag sometimes when coding.

The question though is if those lags you're noticing have anything to do with CPU or GPU performance. My editor and web browser are basically never CPU or GPU bound in their performance.

If you notice a hitch when doing something, that's almost certainly because the computer is fetching data from your SSD that's not hot in the RAM or CPU cache.

Clocking the CPU higher won't help with that at all.