My bet is that jurisdictions with Extended Producer Responsibility laws were going to charge them money to clear up their mess and it became a sensible business decision to make this change to save them money.
But you don't know that. All the previous equipment obsoloeted and tosssed somewhere. All the previous workers retrained or fired. It could be far worse. Trusting plastic makers to tell you the truth about plastic recycling is like trusting WWE to tell you the truth about sport.