PCs have a lot more compatibility with add-ons that he uses for Adobe After Effects
Probably. More people use Windows, so there will be more add-ons made for the Windows version of After Effects.
The thing is, After Effects add-ons are there to make complex tasks simpler. If you already know how to do the complex task, you don't need the add-on.
they are not powerful enough to handle what he does
Wait, what? That's bullshit. I don't believe Adywan said that.
That's a hardware issue. It has nothing to do with whether you're running Windows or OS X - if you don't have enough RAM, or a good enough video card, then yeah, it won't be able to handle high-quality video work. The same thing is true on Windows.
Also, for Adywan to work on a Mac, he'd need to spend a lot more money on his equipment, since - as I've conceded in this thread - Apple products are overpriced. So naturally he'd stick with the less-expensive hardware.
he can expand storage/memory/videocards on the fly
You can do that with a Mac Pro insanely easily. Apple laptops and iMacs, yeah, probably not very easy, but Mac Pros are more easily customizable hardware-wise than any Windows machine I've ever worked with.
I hope Adywan sees this and adds his opinion to all this because he's going to own you.
Haha, I really don't think Adywan gives a flying fuck about Mac vs. PC. He uses a PC because he's used to it, he taught himself PC-centric workflows for what he does, and it's cheaper than working with Macs. You could very easily do everything Adywan does on a Mac, and I don't think he'd contest that fact.
Besides, "He's going to own you"? What the hell? Are you twelve? There isn't a right or wrong here - Microsoft and Apple both have their pros and cons. Which one you choose is a personal decision - I'm not wrong for choosing Apple, and you're not wrong for choosing Microsoft.
The main reason I'm responding to all your complaints is that you seem to have a very distorted, incorrect view of what Macs are, so I'm trying to correct your inaccuracies. That's all. I'm not trying to get into a pissing contest with you here.