That's not really why foldables make sense. It's not for productivity, primarily, it's for entertainment. Videos and ebooks (and other long form text content) look better and feel better on a foldable (for the same reason we have e-readers despite having Kindle apps). Multitasking I'll admit is more useful on mobile now in the AI era than in the past. But really, a foldable isn't meant to compete with a Mac Air or similar. I don't even think it's really competition for iPads. It is nice to have the optionality and flexibility at all times and nothing is more on your person than your primary phone.