> I use a beefy desktop at home and at my office, but when I’m out and about I usually have a laptop with me to hack around on.
I'm not sure how you extrapolate from that sentence that the aforementioned devices were for leisure only. In any case, all those devices (desktops, laptops, 2-in-1/tablety-things) where used for all kinds of work/leisure/experimentation/music-production/graphics-work. Especially desktops were likely used in the same time periods as laptop devices.