Let's face it. How many people, even if they are aware of RP, have the option of test driving RP on a layout? How many people actually have the option of test driving any of the DCC systems on a layout? Maybe Digitrax. Maybe NCE. And even if they do, their experience is influenced by the club or layout owner's implementation and opinion. I postulate a large percentage of people do their best to research on the Internet and then simply make a purchase decision with fingers crossed. I did.
A comprehensive, let the chips fall where they may, side-by-side functionality comparison would be very helpful. RP, Digitrax, NCE, MRC, Lenz, BlueRail, and all the others in columns, functionality in rows. Ideally, the comparison would be free of subjective information.
Personally, I had only 1960-70's DC operation experience when I reentered the hobby. Within 20 minutes Google showed me the current control system market. Armed with the brand names I set off to compare functionality using manufacturer supplied data. That's when the challenge began. DCC documentation is absolutely horrible in its form - organization, completeness, and presentation. Blatantly obvious it is a product of a small cottage industry. Sadly, RP is no better, actually worse. Perhaps I am spoiled from my experience in the electronics hobby where data is abundant and highly organized. Spec sheets exist for everything and the information is presented in near standardized form making comparison a straightforward task. It took me seemingly forever to dig, search, read and re-read trying to determine any one control system's superiority in a particular functionality I was interested in. A good comparison chart would have turned that research into a 10 minute task.