Sorry grandma, you need to purchase and install windows separately. No, the same model laptop with windows pre-installed is out f stock - it always is. No, I don't have time but the store geek cage will install it for $70/hr. Yes, I know it costs as much as windows to install it. Just shut up, take your pills, and fork over the money. Yes, yes, I know you are getting ass raped. OK, just order you one with Windows pre-installed.
[Hangs up. Thinking to self - if that bitch calls again, I and sending her to voice mail.]
If they did do this, each model from each manufacturer will sell a version with Windows installed and without Windows installed. The majority, the average fart sucking person does not want to install windows or linux, does not know how, and will not ever want to waste their time learning now to. Because average people do not do that kinda of thing.
Now the geek will be happy (maybe 5% of sales will be OS-less models sold) and probably just pirates windows anyway.
Offering different models will just add additional cost to the OS-less version, which will make it 20 bucks cheaper which negates the trouble of doing this whole exercise. Also, the OS-less version would probably be a special order because very few people will purchase one.
Just think how many less people (80%) would have even bothered to buy a PC is this policy was in place. Think of the 90s wen you really have to be above average to a blank computer and get it working. For the children out there, you have no reference and probably cant even understand this concept.
Now, is this really a good idea?