Worth it or not?

I was given a i9 11900, I currently have a i7 10700kf but my mobo doesn’t support 11th gen intel.

Paired with a 4070 super ti, would a 100$ upgrade get me couple more years of comfortable non upgrade cpu wise “given that 11th gen gives pcie 4.0 support to my gpu” or would I be wasting my time and money?