So, I went back to look at my original reply, and possibly edit it to say something a bit closer to what I meant, but then I deleted it. I am less than technologically ept. (Which I'm pretty sure is not a word, but I like it anyways.)
NOW, being tech inept, I'm not quite sure how to explain this, but despite the fact that text files don't need much in the way of memory for either processing or storage, in drive it starts hanging once a single file gets too big, and it has trouble sync-ing. And a friend of mine who does know how these things work has been know to complain about the structure of the system, that it is needlessly complex in less than useful ways, to paraphrase a rather vague memory of a conversation.
That said, I love docs for ease of access and sharing, especially for collab or beta purposes, and I'm not about to recommend anyone stop using it ... but sometimes the problems with copy-pasta are very definitely google specific, and I have attempted to put a google doc through a clean html program or filter, and it still requires manual editing to finish cleaning it up, and I have never had that problem with a word doc.