Triumph has been at Daytona bike week many a times, now Triumph does not have the budget like the big guys so they have to choose very carefully where they are spending the pennies
and as you know Daytona bike week is 98% Harley and the Harley riders if nothing else are extremly loyal to the Harley brand.
Royal Enfield is one of the oldest bike manufacturers in the World very surprised you had not heard of them before.
As for seeing other rockets wel ltherocket is a pish poor selling bike , only a select few headbangers buy them now up beside me I see one or two Rockets daily which really makes me mad as I am the only Rocket in the Village.
At the worlds largest motorbike museum they have a vintage weekend every October and it is sponsered by Triumph, at the festival the Triumph bikes out number the Harleys 4-1