I hope this is the case, because fungi always have the possibility of spreading. We're basically talking about mold. The spores are going to travel unless strong measures are taken to prevent that, especially if this is scaled for industrial use outside of lab environments. Waste processing facilities aren't exactly sterile environments.
I prefer risk management to hopium.
We're basically talking about mold. It's going to spread, and it's going to grow in places you don't want it to. You can't assume that it won't spread just because the conditions are not ideal. Active planning and prevention will be required.

It's appropriate that there's a horoscope-based article linked at the bottom, as it highlights the quality of the content being presented. Getting relationship advice from WikiHow is roughly equivalent to making life decisions based on a palm reading, or self-medicating based on a diagnosis from WebMD. Perhaps next you could consult a Ouija board to find out if your crush is really into you, or ask Google's AI how to keep cheese on pizza.
Processing PET is a big deal, it's the primary polymer for a lot of plastic bottles, bags, wraps, and clamshell packages. Being able to biodegrade those things would make a real dent in plastic waste.
But... PET is also used in things like electrical wiring insulation. Assuming this can eventually be scaled up to industrial waste processing, what prevents it from spreading out into the world and destroying infrastructure?
Oh I know, I buy from Amazon too, it just feels particularly ironic in this context.
Damn man, you are really bending over backward to defend this guy... do you owe him money or something?
... a man in a blow-up eagle suit said Amazon had sold out of the frog variety
...
The revolution will not be televised... it will be purchased from Jeff Bezos.
Don't waste your time on jealousy
Sometimes you're ahead
Sometimes you're behind
The race is long, and in the end
It's only with yourself[...]
Don't feel guilty if you don't know what you want to do with your life
The most interesting people I know didn't know at 22 what they wanted to do with their lives
Some of the most interesting 40-year-olds I know still don't
Everybody's Free (to wear sunscreen), Baz Luhrmann
Yes, she's a sympathetic genocidal maniac.
Yeah, but proper failover and recovery requires additional infrastructure, and that costs money.
Hopefully a bunch of risk management people are writing I-told-you-so emails to C-suites right now.