Not sure why you're bringing up NPC crowds from 30 years ago, the landscape is completely different from then. The NPC is essentially a development competition these days and those bumper crowds have been in the rearview mirror for a long time.
That doesn't change the fact that a second NRL team in NZ wont "deal a massive blow to NZ rugby" or somehow magically attract massive crowds.
Because obviously with the collapse in super rugby there is little for them to fall back on
super rugby was unions great hope in this region and for 20 years it fulfilled that role
then australia expanded to too many teams and nz and aus kicked sa and Japan out. And here we are with a coneotition which will be lucky to survive at all
the sa sides have done very well in top 14. Major mistake cutting them out of super rugby
both afl and rugby league are getting all the best union juniors in Australia. In many schools the number of union teams has collapsed eg my school has gone from five in year 12 to two
it’s a battle between the a league and super rugby as to which sport survives on a professional basis