The underlying question is: Why do you want to run stable?
In spite of the naming, the high-quality production version of FreeBSD is the one called "RELEASE". It is also the one that you can upgrade easily and automatically. Even across major release boundaries. From a user or sys admin point of view, the upgrade for example from 11.X to 12.X is not really different from the upgrade of 11.X to 11.Y, both are done with freebsd-update.
Unless you want to volunteer to be a beta tester, there is usually no logical reason to run anything other than RELEASE. Here is a quote from the FAQ:
"FreeBSD-STABLE is the development branch from which major releases are made. Changes go into this branch at a slower pace and with the general assumption that they have first been tested in FreeBSD-CURRENT. However, at any given time, the sources for FreeBSD-STABLE may or may not be suitable for general use, as it may uncover bugs and corner cases that were not yet found in FreeBSD-CURRENT. Users who do not have the resources to perform testing should instead run the most recent release of FreeBSD."