Yeh, Jim, I know. All of the engines I've purchased recently have had Tsunami decoders already installed. But to convert all of my engines, I'd need a bailout from the Feds.
I started DCC in 2000 or so when I bought my first, and only, system. The cost at that time was definitely premium. Most of my units have Digitrax 123's, though a few are using Lenz and MRC's. About 75% of my engines are DCC, with all but my much older Blue Box's needing to be converted, as well as a few other newer units. And most of those "OLD" engines are equipped with the old Pittman-type, open frame motors and rubber band drive. Yes, I still have a bunch of those. Something about them has me keeping them around. The total of my roster is somewhere over 200 engines as I sometimes change eras to model a more modern time.
I think that if a survey were taken, we should find that about 30% of those in the hobby have converted to DCC. I may be a bit high but it is definitely think that DCC is the way to go if one were to be constructing a new layout. My layout is DCC, but was started with power districts. I guess it to be the best of both worlds. But power districts will be obsolete in the next 10 years, I believe.
Bob