You know they sell things like the Surface 3 using an Intel i3 processor, and still sell Windows tablets with Atom processors, right? Just because you have a 12-core i7 with 320GB of RAM doesn't mean every Windows machine does.
Well, like I said, Windows 7 and 8 had voice transcription support built-in and it worked well on my old computers from 2009, with plenty of CPU capacity to spare. I expect a modern i3 would probably match my desktop i7 from '09.