Let's hope you are right.

But if a second-rate magazine manufacturing company moves in first... will a first-rate company follow?

I'm guessing not.
It tends to be a game of One-Ups-man-ship until someone gets it right.
Example...
Marlin 70/70P/70PSS/795/989/989M2/995 and 5-10 others...
same damn rifle, just with different stocks/sights...
Back in the Pre-Clinton Assault Weapons Ban days,
Ramline made a 15-rd mag for 'em. Killed by the '94 ban.
Anyway...Shooter's Ridge came out with a Green Follower mag
as soon as the ban sunsetted...
it sucked, the gamut of problems it had...you name it, it had it.
Champion followed with a Grey Follower mag, but learned from the SR issues...
their issue was wrong glue to hold the two parts of the mag together...
remedied with Plastic Weld by the End User...wheeeee....
Finally, Promag watched those two, then went with a much better design...
their 25 round mags have Zero issues that I've run across so far...
After that, since Promag got it Right, nobody else is making 'em.
Promag has plans for a couple of Drums for those rifles,
but haven't hit market yet.
Depending on who is First to Market for S&W 3rd Gen mags,
will set the pace of the Race.
how good they are sets up the competition to outdo the previous host.