Real world viability of 1.9?

[John Wells]

Guys,

I realize that 1.9 will be a "dev" release, similar to the Linux
kernel. I'm curious, though, given the speed improvements, do folks
intend to use this for production use? Is it likely that many
applications will be switched to run on 1.9, or is this completely
unwise?

And, given that, is there any timeline for 2.0? A year? Two?

Thanks!
John