I can think of no downside to most of the modern electronic ear muffs except one, and then only to certain individuals. And I'm not talking about just for shooting range application. The one exception that some have trouble with is how some/all muffs can interfere with a shooter's cheek weld on some rifles. This is not an absolute since it depends on the rifle and how a shooter shoulders their rifle.
For me the electronic ear muffs are about the greatest thing since sliced bread. I use them at the range and for hunting. I often shoot a .308 AR, and even one shot is freakin' brutal to long term hearing damage...and a non-suppressed 5.56 isn't exactly an air rifle. I don't have any cheek weld issues or problematic ear muff contact with my firearm stocks. I use a slim, tapered model of electronic muff, so that probably helps. It's just a good idea to keep this in mind when considering and selecting muffs. I do a lot of walking around while hunting in my area, and sometimes a shot for pigs or a coyote just pop up without warning or preparation with no reasonable opportunity for installing ear plugs. The electronic muffs I use enhance surrounding sounds to a small degree. I can tell from being around other hunter friends that electronic ear muffs aren't for everyone, so you probably won't know until you try them under actual use. I'd recommend a cheap set of $25 Caldwell electronic slim muffs and see how they work for you.