for anyone like me who is very very (very) late to the Linux #LXC party, this explains why #LXD has been replaced with #Incus.
tl;dr: #Canonical ruined things with a embrace-extend-extinguish play of relicensing and requiring contributors to sign a CLA to contribute to LXD.
https://discuss.linuxcontainers.org/t/lxd-has-been-re-licensed-and-is-now-under-a-cla/18454