The fourth complaint is that it is developed largely without any public discussion - new releases land, and suddenly there are API changes you must include. I'

The fourth complaint is that it is developed largely without any public discussion - new releases land, and suddenly there are API changes you must include. I've written a mail-client which is both configured and scripted with Lua. For ease of embedding it works really really well, and coding it was a pleasure. But I'm still disappointed when I have to update for new Lua releases (e.g. 5.1 -> 5.2 required some changes I wasn't expecting.)