Challenge 2: Why Compatibility Mode Doesn't Save the Macros — Solution Walkthrough

Why the colleague's assumption is incorrect:

Office compatibility mode affects how closely the file's visible
formatting and structure resemble the original .xlsm — it does not
affect whether embedded automation code executes. Per this chapter's
own warning box, VBA macros do not run in Google Workspace in any
form, regardless of which upload path is used. Choosing compatibility
mode instead of a full conversion changes how the workbook looks and
behaves on the surface; it does not open some hidden door that lets
the underlying VBA project run.

The actual reason macros never transfer:

As Chapter 7 established, Google Sheets has no VBA runtime at all —
Apps Script is a genuinely different language (JavaScript-based, not
VBA-compatible), so there is no execution environment anywhere in
Google Workspace, compatibility mode or not, capable of running VBA
code. The macros aren't "disabled" or "blocked" in compatibility mode
— there's simply nothing on the Google side able to interpret them
in the first place.

What the colleague should actually do:

Read the macros to understand what they do, then rewrite that logic in
Apps Script (Chapter 7) — the same real engineering task required
regardless of which upload path was used to bring the file in.

WHY THIS WORKS AS AN ANSWER
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This exercise directly targets the specific misconception this
chapter's warning box calls out — assuming compatibility mode
preserves "more" of a file's original behavior, including automation.
Correctly separating "affects appearance/structure" from "affects
whether code executes" is precisely the distinction the warning box
exists to make clear.