No

It's not been reintroduced
It's never been discontinued

Granted, one or more absolute moron bottommfeeder "gunwriter(s)" may have said so, maybe because they couldn't find one at the local Walmart and may have subsequently decided that "the cartridge has been discontinued" (or whatever that means) but no.
Since it's introduction in 2003 it hasn't ever been discontinued or reintroduced.

Have there been supply issues and shortages?
Absofuckinglutely.
Demand has been greater than supply.

Each and every handgun and piece of ammunition has been taken by the market

Used revolvers chambered in that cartridge sell for more money than they were sold for new

Is it as popular as 22lr or 9mm?
No.

Does Ruger need the help of pissant sophomore window licking editorial contributors to sell 480 Ruger revolvers.
No.

Why did that dude include the 480 in his article?
No clue.