Is this response real? Do you know where the guts of the Neo come from? I hope not LOL.
The 'guts' come from a smart-phone system which is combination of a small personal computer and a 'phone'.
A system that consists only of Arm-cores, GPU, RAM, and storage NAND is not a 'phone'. The 'smart' half is common between all shapes and sizes of personal computers. For example, E-cores are in A and M series chips. Same stuff.
'Phone' part is the critical necessary cellular network subsystem. That is what provides connectivity when in random places (i.e., not hooked to a local area network. ). In the specific case of the iphone it is a completely different and discrete set of chips. ( the smart+phone is far more blurred on Qualcomm phone SoC than it is on iPhone. )
Why not a Neo has to do primarily with price. Apple charges $140-150 to add a celluar model to the iPad. Note that the M-series powered iPad Air and iPad Pro have cellular options in this range also and no A-series processor in sight. So the A-series really has nothing concretely necessary about connecting to a celluar network about it.... it is just a "personal computer" chip. The modem would at to the base price of a Neo
and to the monthly operating costs to it if actually used it. Not many folks on a tight budget that want to pay both more upfront and more monthly for a system. If they had gobs of disposable they likely would have bought either an iPad Pro or MBA. At $699 (the one upgrade) + $150 = $849, that has basically crept up into the MBA 'sale' pricing. Apple is not trying to make the Neo a 'direct substitute' for the MBA. Neo sales should be mostly additive to ecosystem , not mostly subtractive from MBA sales with little ecosytem growth.
If Apple was charging $39-49 for a modem then it would make much less of a different. Quite unlikely they are going to do that. That is contributing reason why the iPhone XXe model costs just as much as a Neo. The modem is a substantive cost addition.
[ iPads have all the hardware to be a phone. They are not a phone because not attaching a general phone number and the rest of the legacy phone services , celluar provides can provide the 'less featured .. just a data modem' service to the iPad. Typically to get to the iPad service have to already be paying for 'phone' service. Almost obody is excited to pay double.
The Apple watch with celluar doesn't have an A-series and yet can be extended to take phone calls (clone the phone number). Again arm-ram-NAND are a different issue than celluar networking. ]