In reply to BoulderGoat:
Wear from biners, getting lowered (indoor and sport) plus abrasion form rock will pretty much wear out the what ever water repellent dry-treatment is has.
So having a rope for casual sport & trad is vise, if you also have a dedicated rope for indoors (shorter) and conditions where dry-treatment is needed (winter and seacliffs).
What I do, is buy a cheapo rope for sport (as we also go to spain, I get a 80m or so one), which can be had for around 100 eur (search for bargains).
Good dry-treated rope is then bought for winter action. And when the treatment wears off, I shorten it and dedicate for indoor use.
From my experience, you get more seasons out of ropes this way than just having a single rope.