Intel has only had their cellular business since 2010 when they purchased WLS and didn't ship LTE until 2013: https://finance.yahoo.com/news/inside-intel-apos-booming-cellular-223000255.html
They bought Infineon, and Infineon has a history of crap radios too. The iPhone 4 was crap (nothing to do with Antennagate, which was basically a made-up brouhaha about nothing since you had to take the case off the phone and hold it a certain way to make it happen) because it used an Infineon radio, while the VeriPhone 4 and iPhone 4s were great, since they used Qualcomm chips.
I'll agree that they had been behind and their products have performed differently, sometimes with worse performance than Qualcomm's. On the other hand, it sounds like you're at the point of Qualcomm-or-bust, which is fair, but you may want to start hoarding iPhone 8/8 Plus/X units or jump to Android since early reports say the Xr/Xs/Xs Max appear to be Intel-only.
Obviously, if the performance is lousy and there are problems, that's going to be a big mess for Apple and I think we'll all sit there and say "yeah, BiggAW was right all along" and you'll get the kudos you deserve. On the other hand, I'd like to think at Apple's size and how important the iPhone is to their future, they'd take into consideration if they were shooting themselves in the foot.
There may be Android phones that have better performance in the ability to keep a signal or raw speed from a tower or even having a new technology first. I don't think anyone here is arguing that.
The thing with the iPhone 8 Plus is that it's not a compelling product compared to what's out there on Android that's a year newer. Even just on radio technology, it lacks B14 and 4x4 MIMO, and it's based on the X16 platform. B14, 4x4 MIMO, and the X20 all improve signal reception and reliability even further over what Qualcomm already had.
That being said, if I were an iPhone aficionado, I would have bought the iPhone 8 Plus Product [RED] SIM free and would hold on to it as long as I could.
For me personally, I was pretty sure I was going to switch back to the iPhone about 6 months ago, but now after the pricing, the Intel modems, and the package Samsung put together on the Note 9, I think it's pretty clear who is competing harder for my dollars, even after the Galaxy S7 battery degradation disaster (it has nothing to do directly with the Note 7 thermal runaway problems, but I think that kickstarted their battery development process and has now caused Samsung to have the safest, longest lasting batteries on the market).
We've already seen that barely anyone, even tech writers who should know better, write much about the inferior Intel radios. This isn't going to be much different with the Xs/Xs Max/Xr, so I wouldn't expect widespread controversy over it. I am curious about what Sascha Segan has to say, as he's already said he's going to do testing on the new iPhones and compare them to Qualcomm devices.
Unfortunately, that is now the case. The iPhone 8+ SIM free was almost as good with RF performance as anything on the Android side, but that will not be the case with the Xs/Xs Max/Xr, so Android phones will just have better service, and iPhone users who stick around will see a lot more of No Service and, on AT&T, Faux G. People's $1449 iPhones will have worse reception than $250 Android phones from Wal-Mart.