It’s true for me. I need a portable workstation more than a mobile laptop, as long as it survives train travels (most have power outlets now), moving between buildings/rooms or the occasional meeting with a customer +presentation it is enough for me.

But I can imagine some people have different needs and may not have access to (enough) power outlets. Some meeting/conference rooms had only a handful outlets for dozens of people. Definitely nice to survive light office work for a full working day.