I agree with the general sentiment here that please don’t, but, if you must, I think it would be cool to practice in secret until you get really, really fucking good at it, then just switch over all at once. Preferably with a large audience. Just be giving a presentation at work and go from Liverpool to Indianapolis, mid-sentence.
No you’re right, it’s mostly stereotypes that don’t have any real world importance. From my intermediate POV, it comes down to GNOME being a resource hog which the 1337 H4X0Rz don’t like. But with most modern systems having more than enough resources to spare, you’re not likely to notice unless you’re the sort to always have one eye on the system monitor pegged to your desktop. It’s an argument for the sake of an argument. I use KDE btw.