I have no desire to make this a protracted "discussion" as "it is what it is", but I'll sum up with comments below...
Two things:
The "art" to sharpening serrations isn't all that difficult or different, really, from plain edges. If you know how, and more importantly the why, to sharpen a straight edge the way you do, a serrated edge isn't all that much more difficult.
The context of the discussion that I commented on is that many people lack the basic skills to sharpen a knife which is why a serrated edge is attractive to them. I have no problem sharpening either type of edge. However, MOST people I know that even bother to carry a knife nowadays cannot sharpen either type of edge which is why I find myself being asked "hey can you sharpen this for me?" all the time.
And the tools needed aren't necessarily different. For the most part these days, I use some triangular Spyderco Sharpmaker stones. Not an actual Spyderco Sharpmaker, mind you.
Well, in my experience there are at least three major profiles of serrations that I've come across and they are all different (compare Benchmade, Spyderco, and Gerber for starters). None of them could be properly re-sharpened or re-profiled using only one size and angled stone. The best tool I have found for this is a DMT Serrated Edge Sharpener which is a pointed conical design that fits most (but not all) of the serrations I've come across. Also, serrations must be done free hand (as far as I know-I've never seen an angle guide available publically for them) which adds to the "art" of sharpening them properly because it takes away the 'crutch' if you will of using an angle guide. So not only is the technique different, but the tools are specialized if you really want it done right without changing the original serration to fit the profile of the stone you are using. I prefer to fit the tool to the edge and not make the edge fit the tool.
Cutting near the hilt with serrations isn't terribly impaired, IMO. YMMV.
Well, maybe we just cut different things then. I know for sure that making something as simple as a pointed stick for my granddaughter to roast marshmallows with is much more 'refined' using a plain edge than a serrated edge which (as it is designed by the way) 'grabs' and tears vs. slices.
Now, as to whether or not we can justify a "throw away society" I'll leave that to the social engineers to meditate on. I just don't understand a mentality that takes something valuable (things do still have value don't they?) and tosses it away because someone is too ignorant, arrogant, or lazy to take care of it. And what does any of that have to do with how wealthy someone is? You may not agree with that, and that's fine, but I still don't have to like it or tolerate it in those I'm responsible to teach and mentor. Hold on to your hat for this one-I don't think a person should carry a blade, firearm, or even a shovel, if they don't have enough sense to find out how to maintain it properly first.
And here we find the second crux of the matter. It is not progress and innovation that is the problem. The problem is the loss of the most basic skills of human self relience. Believe it or not there are people in the world who not only cannot sharpen a knife, but cannot even tell the difference between an adjustable wrench and a pair of 'channel locks'. Now, no one is going to fret the transition from slide rule to calculator because they in esscence are the same tool. But so far as I know, no one has made a tool to replace a pair of channel locks. And without the knowledge of what the heck they even are, how can one begin to address the problems that a simple pair of channel locks solve (like "gee, how do I turn this?). This has led us to a point in our history where we are teaching our children to solve problems with a telephone and a credit card and not their brains. "Daddy, this knife won't cut!!!!! boo-hoo" "Darling, here go buy another one!" "Thank you daddy!"
No one needs to justify their choice in blade to anyone-period. I could care less what anybody buys or carries. But that doesn't change the fact that a whole lotta people are buying based on convenience and marketing without honest regard to intended use or need.
Oh well, back to the dog house....
Take care, and may all your blades be sharp!