Siiiiighhhh............
The Good Ol' days.........
I'd bet that in their primes THESE guys could guard on the perimeter in stretches.
Nowadays? To answer the OP - I'd say the NBA is a LOT more open to Twin Tower concepts with decent quickness, agility and know-how, especially RIGHT NOW...
A certain tall, long, athletic, gifted Big is out next season. Slim Reaper.
If Kristaps had arrived in DAL a few years ago I think he and Dirk would've made a DEVASTATING Twin Tower match up....oh wow...........
I don't think there is ANY team out there now like GSW was...they are no longer the archetype....teams don't have to match up to them anymore.
We can FINALLY go back to somewhat traditional basketball.
To answer the OP I'd say yes...teams could try it now - with GSW no longer in the picture.