How effective is 5G? Do you notice a difference vs. 4G/LTE?

Over the past couple of years, cell phone carriers have forced 5G capable phones by saying 3G/4G/LTE is being shut off (allegedly).
Anyone here notice a difference by keeping their “old” 4G phone?
If you have a 5G “compatible” phone, yet no 5G towers nearby, what’s the point?