The main disadvantage between IR remotes and wired releases is that IR isn't that reliable outside in bright sunlight. It works much better at night or indoors, but outside, the sunlight can overpower the IR signal and drastically reduce range and/or reliability.
IR also requires line of sight between the IR remote sensor on the camera and the remote itself (think: tv remote). And most dSLRs have this IR sensor on the front of the camera in the assumption that you will be using the remote to make selfies (or group shots with yourself in them)--not that you will be using the IR remote from behind the camera. If you plan on using the remote for long exposure or night sky shooting, and you're going to be working from behind the camera on a tripod, it can be an interesting exercise in contortions of the wrist to get that remote pointed at the sensor.
RF (radio) remotes can typically remove the line-of-sight and range restrictions and work well in daylight, but instead of having to remember a single unit, you now have to remember two: the remote transmitter, and the receiver unit that plugs into your shutter release port. And both of them will require batteries. If you are considering an RF shutter release, realize, too, that most flash radio triggers can double as shutter remotes, so if you were planning on "going Strobist", you may be able to make your triggers do double-duty.
Wired releases may or may not require batteries, but you still have to remember to bring it along to use it, just like a wireless remote. But many wired releases can have additional features you will not find on wireless remotes: the ability to lock down the shutter button for bulb mode, intervalometers, timers, etc. But, of course, they're wired, so your ability to work the camera remotely is more limited.
Basically, these are two different tools, not replacements for each other, and many photographers happily have both in the bag.