Walys As also luceos mentioned in the other discussion, the idea is for them to coexist. The functionality of the initial version of the PMs will be basic (no multi-recipient or group messages). On the other hand, the intention is not really to replicate Byobu feature set. In any case, we are definitely getting ahead of ourselves since we don’t even know the full set of features that the future PM system will have (post-launch 2.0), nor the potential changes that Byobu might undergo, which could differentiate them even more.
In summary, at least in my opinion, I am quite sure they will coexist for quite some time, if not forever.