Actually, Holochain 0.2 has been with us for a long time — since last May — and developers have been actively building hApps on Holochain 0.3 for a while as well. But for developers who are new to Holochain, we’ve still been recommending 0.1 up until this point. That’s because 0.2’s new networking layer introduced a few performance regressions and peer discovery issues, and we wanted to be confident that the user experience was reasonably smooth before recommending it.
Read Article: https://blog.holochain.org/holochain-0-2-is-here/