Simplify the following text for a Grade 10 native English-speaking person.
Original: The synchronized release date of the two operating systems reflected the merging of the workstation and server kernels back into a single code base for the first time since Windows 2000 .
Simplified: The same release date of the two operating systems showed the merging of the workstation and server kernels back into a single code base for the first time since Windows 2000 .