i had to get new sim to use the VoLTE and WiFi calling on my s9+, so depends on your mobile phone (new phone needs new sim)
Generally, most people do not need to regularly replace SIMs. Obviously, if you change devices and it requires a different SIM size, you will have to change the SIM.
When LTE was first introduced, the older SIMs did need to be upgraded to LTE-compatible SIMs. Perhaps when 5G becomes available, we might need to switch to 5G-compatible SIMs as well. Otherwise, there is no real reason to replace a SIM card unless the card itself is malfunctioning.
Hope this helps