Do I need more than one pump?

I joined a couple of exclusively pumping yard sale groups on fb recently. As you would expect most of the posts are from people that have ended their pumping journey. Most of them have 2 or 3 pumps that they are selling and they've all been used at least a few times. I do have 2 pumps bc insurance covered them both and I wanted a back up just in case but I love my s1 so that's all I really use.

Should I be using/have a variety of pumps? Like is there a benefit to switching it up every now and then or something? Or did these people just have great insurance that covered multiple pumps? I have seen some posts where they have like 3 spectra, 2 momcozy, and then a few brands I've never heard of. I guess they could be resellers but the posts didn't seem that way?

Just found it interesting. Thanks for any insight.