2.3 is a beta anyway, and require users to update often.
It is considered quite stable because there are 30,000 users out there using it.
Every month, 3-4 updates are released.
updating is automatic and requires users to just click "yes".
if this is not compatible with your needs, it is ok to use it in a LAN context and update every 2-3 months.
In an internet+business context instead you need to stay updated.
Stable versions like 2.2 have sporadic updates, like every 3 months.