I think the answer is no, but can Ergo connect to other IRC servers? I'd like to set it up linked with my existing ngircd, for my users to try out, and then if it goes well shut down ngircd, which is a pattern I've used before when migrating between servers.
Here [1] is a table that has IRCv3 features by platform and then view each platforms web site to see all the standard features they support outside of IRCv3. FWIW one of the most popular by market share is UnrealIRCD [2].
