A “traveler’s” journal that consists of a cover and replaceable notebook refills. Cheaper than having to buy entire journals once you finish the last one (though uglier, since these refills don’t have cool covers), you can interchange them based on context/what you require and journaling is pretty great by itself.
I this case, they are probably suffering from success. Shitty manufacturing and unrepairability aside, the M macbooks are the first competent macbooks in quite a while, so most people probably bought the first versions and now they have no desire to upgrade, because why would they? I have an M1 Pro and aside from gaming performance there is absolutely no reason for me to upgrade.