I have Triumphs from all three eras. An '06 Scram, a '68 T120R, and a '56 TR6.
Of the three, the new bike is my favorite. It starts every time, with an electric starter, the lights work every time, good brakes, and there is no puddle under it.
The '68, feels much lighter, but suffers from weak brakes, and has many drivetrain issues, the result of thousands of miles, and poor maintenence habits by previous owners.
The '56, probably the best handling bike of the three, again, marks it's spot in the garage everywhere it sits. Isn't legal now, and because of what seems typical damage to the chain cases, probably never will be.
It has been rebuilt so many times, I'm thinking of zippers on some of the parts.
Riding each bike is a totally different experience, with the new Scram being the most trouble free of the three. The only grease or oil on it is from the chain, something I can't say for the other two.
Vintage Triumphs are fun, no doubt, but they require attention beyond what is considered normal, and inmyarrogentopinion, are not viable mounts for daily drivers.
I thought seriously of selling the '68 when I bought the Scram. I have since changed my mind. With all it's faults, and there are many, I still smile every time I touch it.
The '56? If I end up living under an overpass, I will be dragging that '56 along with me. :w