I will first acknowledge that Charlie Wilson knows more than me. I am not meaning to dispute his claims.
However, I am the elusive “had solo, went back to a tandem”. I prefer a solo playboat in whitewater, and if I ever had to make serious mileage (for some sort of canoeing job), I would use one of those cruise-missle type solos. However, for pure joy of paddling, I prefer a tandem, about 16 feet, with some rocker.
I’ve owned about 10 canoes, and paddled dozens more. I had a Mad River Guide, and a Bell Wildfire (RX), and sold both within a year or two. If I was going on a solo trip, I would prefer a Bluewater Prospector, or similar light tandem boat.
I understand that many prefer solo boats. I have come to realize, though, that they hold no practical advantage for my uses.
Learn to paddle in the classic Canadian style, and then outfit your canoe to your liking, and you will have a very versatile craft.