Originally posted by shmsnh
That's the entire point of having rings. Fast rings are going to get the latest updates. Only when most bugs are fixed, it gets sent to the Slow ring.
The Release Preview ring is for Production releases.
Originally posted by Mauroo4
What are the most annoying bugs do you have? I've got that build installed on my Lumia 640 XL LTE and it's one of the best insiders builds I've ever tried
Well, constant Wi-Fi drop outs, unreasonable random restarts, slow and buggy lock screen, missing notifications from store and mail, keyboard stopped learning my words... These are the ones that pop into my mind right now.
I used to be on the Fast ring but changed down to Slow Ring after having to hard reset my device quite frequently with some of the latest builds. The slow ring is actually very stable. More stable than I thought. It makes sense to use the Slow Ring or Release Preview on your daily driver if you want the changes and updates with less of the game breaking bugs. I do agree with user-744 though. It seems the Slow ring gets the least number of updates. Here's hoping the recent fast ring builds, which are becoming more and more frequent, means a slow ring update is not too far behind.