Form factor was always a secondary factor. First and foremost was high specs in CPU, memory, storage, connectors and screen. i.e. for a Pro-fessional user (photographer, graphics designer, film).
I think you're getting confused with the non-Pro macbooks and 'air' line.
I'm wondering what you've been using your mac for if performance isn't a concern... I'd be concerned that you might have been paying over the odds ...