It's backwards compatible, too — while a USB - C connector won't fit into a larger USB port, it'll still work with older accessories with an appropriate adapter. (businessinsider.com)
Pouches twist lock onto pumps from ALL major manufacturers (using the appropriate adapter, sold separately) (allaboutbreastfeeding.biz)
The 4 Rider Next is compatible with some car seats when purchased with the appropriate adapter. (strollerdiva.com)