My shopping trolley carries a literal trunk load of groceries. I walk it around town for two hours every week. Car-free is carefree, I don't give a fuck how it looks.
I've only had two over the course of four years so I'm not qualified. I will say this: if you're going to be walking outdoors a lot, consider avoiding ones with the triangle of wheels that go up stairs more easily. The smaller wheels are significantly louder on rough pavement.