Excellent question!
I'm assuming you mean wireless air integration, or WAI, not those consoles that have a dive computer on the end of an HP hose. Side note, we once had a very boring discussion here about how WAI really should be called "hoseless" AI, since there are no wires involved. But I digress.
I used WAI a few years ago, and I found it to be not that reliable. Perhaps it is better these days. I don't feel the need for it, I see it as an expensive potential failure point. Yes, I know that SPGs can also fail.
As far as your question goes, here are my thoughts for three types of diving.
Recreational diving: rec divers really appreciate WAI, because it lets them frequently and easily monitor their tank pressure. And in most cases, tank pressure is what determines the dive profile (unless a diver has a good enough SAC rate to let NDLs determine the profile). So they check it frequently.
Open circuit tech divers: I don't know what the kids are doing these days, but in my day, tech diving was all about planning and situational awareness. So while you still would check tank pressure on occasion, a tech diver has a MUCH better awareness of his or her typical consumption rate, and less overall anxiety about the dive. So they are probably only checking their tank pressure occasionally (maybe every 5-10 minutes). There is always a tradeoff in these choices, and by putting a tank pressure reading on your dive computer display, you are displacing some other piece of data - either by making the numbers smaller to fit more into a limited space, or shifting it to a secondary screen. Since you don't need to constantly monitor tank pressure, why not just have it on a plain old SPG that you can glance at occasionally?. That single HP hose coming down your left side and clipping to your left hip is about as unobtrusive as scuba gear can get. Maybe sidemount tech divers like them? I would be a little concerned about being sure which display was linked to which tank, but then again, sidemount is a mystery to me on many levels.
CCR: With a rebreather, you are even less concerned about your tank pressure than an OC tech diver. There is a
current thread about whether you even need an SPG on your rebreather tanks. Once you get experienced (and assuming that you aren't doing a huge amount of up and down sawtooth profile), you hardly use any dil at all - a 3 L tank can last for many dives. Your O2 consumption is pretty predictable and independent of depth, and you often start with far more than you will use in a dive. Yes, it's possible to run out of O2, but that would imply pretty poor planning, and if that happened, you are carrying bailout. It also wouldn't be like running out of OC gas and suddenly getting a dry reg. If you lose O2, your PO2 will drift down and when you realize that you can't keep it up, you would bailout or do SCR mode. I hardly ever look at my SPGs during a dive, maybe for a boom drill or a real boom. But even then, you have options that you wouldn't have if your single tank LP hose blew out.
What CCR divers DO look at constantly is PO2, which is why Shearwater invented the NERD. And apparently they tried to market it to OC divers, which makes no sense at all. OK, maybe a recreational OC diver is nervous and compulsive enough to want the tank pressure on their wrist so that they can check it easily. But there is NO need for them to be constantly staring at it during the dive.
My 2 psi.