I tried beta4 after the "new" post, but doesn't sound that stable.
It feels like stopping responding to touchscreen input for seconds, and appear not to connect to wifi networks.

Any happy experience, 860 users?

beta3 built by pgas

is it as stable as beta1?

I don't see any difference in my tasks. I moved there because it supports UTF-8 much better and have updated versions of some packages. Anyway it makes sense to do NAND backup to rollback smoothly in case of problems