I'm developing an application to support multiple concurrent central-and-peripheral connections. It's a bit messy but is just about working. At the moment I'm using SDK 9.0.0 and the Device Manager.
I noticed in SDK 10 there is a new peer manager. The release notes say: "Added an experimental module named Peer Manager. This module will eventually replace the existing Device Manager. The new Peer Manager improves on the Device Manager in multiple ways, mainly by supporting concurrent central and peripheral connections."
It sounds like the new PM might be better suited to my application, but the fact it's described as "experimental" makes me wonder about its reliability. Is it recommended to migrate to the PM for new designs or stick to the Device Manager?