Yep, there are a lot of reasons for using both Braided and Mono. lines
I think the best way to descibe it is there is a place for both. I recently picked up some 20lb ande backcountry and, so far, I am pleased with the results. While Braids have clearly advanced over the past 10 years, mono line has made significant improvements in, say, the last 2-4 years as well.
For me its Mono on conventional reels (especially around the rocks) and either braid or mono on spinning reels depending on the size of the reel and the area I'm fishing. (generally, light tackle-braid, heavy cover -Mono).
Just my $.02
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