It’s still a transport thing, but not a poorly optimised transport thing: You can fit 2 meganobz and an 8-man burna squad with 7 Burnas and only one Spanna in a Trukk. The extra burna and extra spanna might not matter much compared to having a second unit in the transport. (This is effected by the fact that spannas have been somehwat a downside of a mandatory upgrade - now that weapons are free I’m not sure how much a second kmb and a burna is worth vs the meganobz.)
It’s still a transport thing, but not a poorly optimised transport thing: You can fit 2 meganobz and an 8-man burna squad with 7 Burnas and only one Spanna in a Trukk. The extra burna and extra spanna might not matter much compared to having a second unit in the transport. (This is effected by the fact that spannas have been somehwat a downside of a mandatory upgrade - now that weapons are free I’m not sure how much a second kmb and a burna is worth vs the meganobz.)