"Hypothetical" joins a list of a lot of other words like "infeasible", "random", "real", etc. where we apparently have entirely different semantic interpretations.
> An AES library that might not even work (since no one actually uses it)
The library I provided was the first result I got when I searched for "parallel AES", and it's not used because there aren't a lot of scenarios where people need the extra performance extracted by splitting workloads between CPUs & GPUs. Ways to improve the parallel processing of AES was still the subject of some research a decade ago, but there's not a question as to whether it is feasible today. There's just not a lot of call for software that does it because aside from brute-force attacks, in practical scenarios the hardware is already fast enough.
> You don't. Unless you're saying the author has already integrated this into the described software stack?
So now the scenario you've got here is someone with requirements and means at their disposal to regularly pull down data over a single connection at gigabit speeds from the Internet, but doesn't invest in their network proxy enough to get hardware that can decrypt at performance that was available for commodity hardware over a dozen years ago, who is hacking away on a Raspberry Pi to MITM their Internet access, interpret layer-7 protocols, develop software to manipulate those protocols in ways that don't break the functionality they require but do break ad platforms, but don't have the resources to swap out their encryption library?
I give up. You win.