Exercise 2: SMB Since Mavericks — Possible Solution
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WHAT CHANGED IN MAVERICKS
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Per this chapter, macOS 10.9 (Mavericks, 2013) dropped AFP (Apple Filing Protocol) - an Apple-only file-sharing protocol - as the default, replacing it with SMB (Server Message Block) as the primary protocol behind File Sharing.

WHY IT'S A GENUINE INTEROPERABILITY WIN WITH WINDOWS SPECIFICALLY
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The chapter explains that SMB is the exact same protocol Windows file sharing has always used. Before this change, a Mac and a Windows machine sharing files natively required bridging two genuinely different protocols (AFP on the Mac side, SMB on the Windows side), typically needing third-party software to translate between them. Once macOS itself speaks SMB, a modern Mac and a Windows machine can share files and folders directly with each other, with no translation layer or extra software required - the two platforms are now speaking the identical protocol rather than two separate ones that happen to accomplish a similar job.

WHY THIS WORKS AS AN ANSWER
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It correctly identifies AFP being dropped in favor of SMB as the specific Mavericks-era change, and correctly explains that the interoperability win comes from macOS and Windows now sharing the exact same underlying protocol rather than requiring a translation bridge between two different ones.