It's definitely a good time to join or start one: Verticalized Consumer Packaged Goods startups with solid software infrastructure (hence the ability to power logistics/distribution/etc. with software) can undercut incumbents while maintaining a healthy margin.
I think the key phrase here is _verticalized_. Go-to-market as well as scaling operations is much easier when you can focus on a single product category.
Maybe a good time to join a CPG/e-commerce startup :)