[phoe-krk]

Technically speaking, Libera Chat did start from scratch. It isn't their fault that another IRC network was in the process of imploding at the very same time and many projects and people felt the need to move to a less deranged foundation, therefore fueling the effective userbase of Libera.

[Shish2k]

The instance of the software was started from scratch; the communities (which are the hard part) were largely cut & pasted