Thank you for the motivating comments! I need those.
Yes, the fact that most Super Course owners seem to have an above-average fondness for these bikes is one thing that attracted me. The other is the Raleigh habit of keeping top tubes short on their taller bikes, which seems to work well for me. This is a 64.5 x 56 frame.
This is definitely meant to be a rider. First order of business will be to disassemble, clean and see what's what.