There’s something called blast freezer, which is basically a freezer with fans inside, like what convection ovens have. It cools down food much faster than a standard freezer.
The pacojet is way expensive, also, the pacojet patents runned off and now there exists way cheaper alternatives that work in the same way. Check out the NinjaCream.
Just reading a quick review of the Ninja Creamy, the Pacojet can run without putting chunks of plastic in your ice cream.
"In early 2023, a moderator in the Ninja Creami Community Facebook group introduced a new rule: No more posts about the plastic issue, lest they clog up the group."