Based on his description, they sound a lot like update rollups, or maybe they are service packs.
Paquay's bottom-line advice to IT pros was to deploy security updates as soon as possible. IT pros should validate optional updates and then deploy them proactively.
He outlined Microsoft's new hopes for IT pros that patch Windows systems in an Ignite talk this month, called "Getting Ready for Windows 10: Servicing Windows Client and Server in a Managed Environment Today." Paquay explained that Microsoft would prefer it if IT pros would be more "proactive" about installing optional updates and update rollups than they have been in the past.
They should also turn on telemetry reporting so that Microsoft can get the feedback it wants.
In the past, Microsoft had published information saying that hotfixes should only be deployed if an organization was experiencing the specific problem being addressed.