The keyboard and upper case enclosure doesn’t constitute “vast portions of the final product” to me. That still leaves the display, logic board, audio board, io

The keyboard and upper case enclosure doesn’t constitute “vast portions of the final product” to me. That still leaves the display, logic board, audio board, io board, fans, track pad, lower enclosure and all the misc parts like antennas, hinges etc. Should it be possible to replace just the battery and not need to replace the entire top case with it? Sure. And for some of their laptops you can (like the MBA) and for the others they say they will be providing separate versions in the future. But we should be clear here that you’re not replacing “vast portions” of the laptop even if you did it now. You have to remove those items to replace the component, but remove and reinstall is not replace.