That article is errrr....interesting....I can think of one reason why some of the parts mentioned may be experiencing corrosion, but will leave it there.
I'd say the RAF could do with two squadrons of C-390, if it's proven to be reliable by the initial non-Brazilian customers (far from home parts/tech support prove out besides reliability). They would complement the existing A400M and C-17 fleets imo.
More and more seems to be happening with tactical airlift - more customers, more jobs to do, more capabilities.