It also has its disadvantages (which to all but maybe a very small handful of niche riders will vastly outweigh whatever benefits it may offer), mainly: cost, weight, difficulty of mounting a quality rear rack [as the OP requested], extremely limited availability of 'full suspension' road bikes, and lastly and most importantly full suspension road bikes solve a problem most of us aren't having. You can quote theoretical physics numbers all day but millions of cyclists have ridden hard tail and fully rigid bikes for literally hundreds of millions of miles and most of us have never crashed because of a 2cm crack.

I don't mean to be snarky but I don't understand why you would advocate that the OP needs a FS road bike for commuting when 99% of commuters (check the commuting forum if you don't believe me) prefer a hardtail or fully rigid bike for commuting on pavement.

As for the Alex Moulton bikes, it's unfair to compare overpriced novelty 'minivelo' bikes with standard 26"or 700c wheeled bicycles that most of us ride.