+ slightly more flexible onboard bag 'allowances' (or at least guaranteed cabin storage). Same in Delta. If I bring a laptop bag outside of travelling in F, it always has to go under my seat and, if I'm fair, sometimes doesn't fit as it's so full. In F, it's always accommodated above. Essential when you're a business traveller with a cabin and large laptop bag. CE and domestic F is worth it for this reason alone, for me.