The transitions from about half of the versions between 0.3 and 0.10 were worse for me. From 0.10 to 0.15 were smooth. 0.16 was tied to phx 1.6, which made it worse again, but I didn’t find it that bad.

0.16 to 0.18 has been mostly okay again, but I’ve seen bugs introduced into an app just by adding IDs to HTML elements with a phx-hook on them. This is a problem since heex templates enforce that each hook does have an ID. It’s also strange that a totally new ID never used elsewhere in the app would break existing JS interop, but it does and it’s what I’ll be working on this week so we can continue upgrading…

Not sure what it’s going to be like upgrading to Phoenix 1.7, but I think it’s going to be a major undertaking and unfortunately most my Phoenix-related screencasts will become obsolete. Elixir itself and Ecto have been really stable, though.