can't see him reaching 50
what is the record again, vilas with 46?
if he reaches or surpasses vilas, then he's done well
regardless, he is already the best of all time on clay
he holds all the relevant records at slam and masters level, plus winning streaks and consecutive tournaments
lets not forget that vilas (and muster) actively played and won a lot of small clay tournaments (250s equivalent), nadal has not spent his career doing this
He will probably do that from now on, Vilas' record is not safe.