Does it make sense to replace my existing gas fireplace with a newer electrical one? Would the new electrical one require less maintenance? Would it run more efficiently and in doing so cost less to operate?
location = US / IL
This is a pretty subjective question, so it will probably get closed. However, generally speaking, gas is cheaper than electricity for heating purposes, i.e., it takes less $ worth of gas than electric to heat "whatever", so the cost will most likely be lower for the gas one. Heating is not a particularly efficient use of electricity.
Gas fireplaces don't require much maintenance. You also get the benefit of a more natural looking flame (although the modern electrics are pretty impressive).