Muscle memory and familiarity cover up most of the oddities of the Apple II and Atari keyboards. I never thought about or noticed the return key being off the home row until noted in the article. The weird placement of @ on the P key is also weird once you think about it. I am sure there is lore behind that decision
I'm finally used to the @ being on the "2" key on US keyboards. It's not there on British ones I grew up with, perhaps justifying it being on the "P".
One of the best things about the 128 Spectrum was that you could just type in all the keywords like PRINT instead of spending 5 minutes trying to find the right key combination, as on the previous models. The 128 taught me to type.