Here you go, 7 section Citadis mockup (using Alstom because they have larger articulation sections)I think even before conversion to heavy rail, they could buy long articulated LRTs that would allow for more standing room, like they did with the Toronto Rocket trains.
Heres a mockup of a 7 section Flexity
I'm sure with dual panto you could make one even longer, the entire length of the platform.
Would be cheaper than subway conversion.
Basically a subway train.