This is technically true but in practice Docker for Mac hides this from you and does not require a prohibitive amount of memory. 99% of the developers at my company have 16gb MBPs and we all build multiple Docker containers daily.

As weird as it sounds, Microsoft had implemented the full namespaces stack in Server 2016 (unavailable in Win10 as the base for native containers is Server where kernel differs a bit), which Docker supports (and k8s in alpha/early beta).

Docker switched from LXC to containerd in 2016.