How To Create Printer Spreads PDF for Saddle Stitch Booklet?

Anecdotes ≠ opinions but they certainly seem to form the backbone of a great deal of opinion, so I don't know what you have to disagree with there. I have a need and the software doesn't fulfill that need. And it has been my experience on more than one occasion with printers and more recently (the past 3 years) with shops that specialize in brochure printing specifically. The definition of "any modern printer" is also curious, probably likewise as anecdotal as my stated need, and certainly subject to a great deal of assumptions about use case. From mom and pop shops, to printing comps at Kinkos for a client, to fulfillment with massive web presses, I would expect my software to cope with relative ease on a demand that has been there since the dawn of saddle stitch. The current job that I am setting up is on a massive printer that can offer more competitve prices for their jobs if the designers pre-impose the job. Not the way I normally work, but they certainly aren't the first to request it. But to argue that a professional level piece of publications software can't figure out basic imposition as part of the natural order of things is kind of silly. And to presume that my or anyone else's definition of need from their software is disagreeable somehow smacks of arrogance to me. Sure, maybe I won't get the kind of precision in crossovers and the like that I would from in-house software dialed in to the vagaries of a given press, but then not every job has a $100k budget and 6 color heidelbergs...