Is senior Tonkinese behavior still socially demanding but less trampoline-like?

Yeah, pretty much. Tonkinese cats don't really lose that need for human interaction as they age-they'll still follow you around, demand lap time, and yell at you if you're late with dinner. But the "trampoline" phase, that manic kitten-to-young-adult energy where they bounce off walls and climb your curtains at 3 AM, definitely fades around 8 to 10 years old.

You'll get a cat that still wants to be involved in everything you do, but prefers to supervise from a cozy spot rather than launching off your head. They'll still chirp at you for attention and might even get more clingy as they slow down, just without the zoomies. Expect a demanding, affectionate companion-just one that uses the couch instead of your face as a launchpad.