Except that if the cheaper chips have ECC, they probably couldn't go up much in price — that price is limited by how much people (who don't care about ECC anyway) are willing to pay. So if prices for the low end went up, people (like you) would instead go without (meaning Intel doesn't get your money), or try to get second hand (Intel doesn't get your money), or go with AMD (Intel doesn't get your money). But Intel would really like to have your money, or at least generally more money.
Intel would like to make the same profit per wafer as before. Any savings you get as some who wants ECC gets added weighted by fraction of volumes to chips in my price class. No thanks.
