I really like analogies, and I understand yours, but you are wrong. You are welcome to figure out another that doesn't fail in the following points. I won't take it as "argument", and I hope you don't either.
a) If you can "program" a batch, you mot probably can do it in linux, or any command-line system, because you know what a batch is, at least.
b) If "Apple" products were intended for programmers mainly, I wouldn't be requesting this. I'd be studying linux or any other geeky OS. And then, IF OS X was NOT for general public, It'll still take you less time to copy/paste from 5 websites (The only program I work with many windows with) than setting up "a batch for 5 documents".
c) Thumbnails are not designed for documents you don't know (open browser windows), but for documents you both a) know the name and its content, 2) it's graphically distinguish-able at that reduced size. Otherwise, it takes more time for you to figure out its content (to decide wether to choose it) than switching windows the annoying way is required now (skipping all the docs you already worked on which were piling up below your frontmost document)
The main problem here is we are children, we are told we got a "car", to move around as dad's, but instead of batteries, it has pedals. So it's more like "a bike". So we sit, push one of the pedals, and it doesn't move.
IF WE HAD TOLD, it's like a bike, we wouldn't be complaining, because we KNEW we still have to pedaling.
In this case, we are told it works as a "stack" of papers, and you even defend it, but it's not.
If you tell me you work with a pile of papers (not 2-3 pepers. That's NOT a pile but a letter you can find the next page in one look, because one has a header, the other a signature, and the middle one is full of text), then I'd know I'm wrong.
A stack of papers is something you don't manage as 3 papers. You need extra people, a batch/bin/shelf/grid, computers, a LONG table, a large floor, or something else to deal with it, but mostly if it remains in a "stack", it's because you'll work with it in a secuential manner, and (this is not my opinion) you WONT put the one you just worked with below the next, but at the end of the stack, or just away.
I agree it work as a stack. We all agree? cool. Now take the document I just worked with to the bottom, or rotate them, never breaking the order in the loop, so I can TELL where it must be. Oops, most of people work with only two docs… well, stop calling "stack" and give me another option that is. The famous Apple "option" key is wasted here, when switching open docs (command alt ~). An extra option is there, waiting in the useless option key, just wasted.
I use Macs since 1989, and I was used to find "options" for the second most predictable way to do something and I was happy. I just thought like "I wish I can do this extra action or a different way" and including "option" in the key-stroke made me feel Apple listened to me. It just did what I wanted.
Today, I'm sad to see that they are reduced more and more every day, making the OSs in the computers on the shelf fast and forcefully minimalist, and after the first update slow and still without those options.