You don't need air integration. It's a marketing ploy to part you from yet more money. A lot more money.
The ONLY benefit of air integration is logging your gas consumption. Unless you have a Nerd2, the display is on your dive computer on your wrist which is just as easily accessible as a bog-standard SPG.
In all seriousness, AI really doesn't help you on a normal recreational dive. You MUST still check your gas regularly and be able to estimate how much you've consumed during a dive. By having an SPG, others will see that you're checking your available gas and it's a very good habit to get into. The problem with having it on a computer on your wrist is you become blind to the information as there's so much: depth, NDL/TTS, time, and available gas. By having gas in one place - SPG - and depth + NDL in another you separate the concerns; makes you a better diver.
Another issue is the transmitters are big. They're ideally suited as handles (sticking out of your first stage) - not a good thing. They need new (specialist) batteries which are definitely not ubiquitous. They can also have problems syncing.
AI's also a pain when you just need to check what the gas content of your cylinder is; you have to have your computer turned on and wait for it to receive the transmitter's info. An SPG just works and anyone else can easily see your gas pressure.
Fight back -- don't let the marketeers win!
Oh, and friends don't let friends buy Suunto high-end computers. They're a waste of money and have some horrible habits (locking you out; ridiculous "conservatism"; proprietary algorithms; one application available; excessive deco....). Friends let friends buy Shearwater or other comparable computers as they're very reliable, standard and use simple AA batteries (Teric excepted).
Incredible how much misinformation and fish manure can be combined into one post such as this one.