When replacing Home Air Conditioner compressor should a coil also be replaced?

Most older residential systems run on R-22 refrigerant. The newer air conditioning compressors run on 410A refrigerant. Some evaporator coils can be converted to run on 410A. There are some coils however that can't be used with 410A. In this case you will need to change the coil. In my opinion it is better to change the coil because older coils will not be as efficient as the newer ones. And most new air conditioning coils have plastic drain pans that won't rust out versus old metal drain pans that tend to rust and leak water.