Having had a fully chromed bike (Thorn Nemesis) I'm not convinced that chroming is as resistant to corrosion as a good powder-coated job.
I found breaches of the chrome under the front and rear forks and would not consider repeating the experience.
That said, I do like the look of the stainless steel Moultons and am seriously considering selling my wife......would have to make up the balance of course.