I can kill a set of uncoated strings - Martin Phosphor Bronze, for example - in a day. Elixir Nanowebs last me for weeks and suit my guitars perfectly. If I divide the price of the strings by the number of uncoated sets I would have to put on in their place - no contest.

I've had a set of Elixir .012 electric steel Nanowebs on my jazz guitar for over a year now - about due for a change - and they're still clean and in tune.

No more to be said, as far as I'm concerned.