

In the beginning, things would suck, because low prices come from economies of scale, and the petrochemical industry certainly has scale. Once you’ve ramped up glass, paper and metal packaging factories, it should be tolerable.
There are also new materials such as biodegradable plastic and even mycelia. That would be useful.
If we also ramp up various carbon capture technologies, you could technically turn that carbon into plastics, so you won’t need any more oil. Obviously, that wouldn’t solve the climate crisis. You need CCS for that. Probably not going to happen within the next century, but it’s technically possible.
There’s plenty of variety within that term. Also, recycling some of them requires very precise conditions.