Exercise 1: Why Step 2 Needed No Research While Step 1 Needed Three Commands — Possible Solution
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WHAT STEP 1 ACTUALLY INVOLVED
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Per this chapter, installing Nginx required "apt install nginx," "dnf
install nginx," and "pacman -S nginx" - three genuinely different
commands, one per package manager, exactly as Chapter 6 catalogued for
these three families. Each package manager has its own distinct syntax,
so accomplishing the identical goal (installing Nginx) required
knowing which specific tool a given machine uses and using its own
particular command.

WHAT STEP 2 ACTUALLY INVOLVED
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Per this chapter, "sudo systemctl enable --now nginx" is described as
"Identical on all three - Chapter 8's own convergence point." The exact
same single command works, unchanged, regardless of which of the three
distributions is being used.

WHY THE DIFFERENCE COMES DOWN TO WHAT EACH LAYER ACTUALLY IS
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Per this chapter's own finding-box, "Debian/Ubuntu, Fedora, and Arch all
converged on systemd, per Chapter 8." Package management and service
management are two entirely separate layers of the system - the
package manager (apt/dnf/pacman) is one of the areas where these three
distributions genuinely differ, per Chapter 6, while the init system
managing running services (systemd) is one of the areas where they
happen to have converged on the identical tool, per Chapter 8.

WHY THIS ISN'T A COINCIDENCE FOR THIS SPECIFIC CAPSTONE
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This chapter's own finding-box calls this out directly: "the one step
this capstone didn't need to write three times... in sharp contrast to
Step 1." The capstone's own structure deliberately surfaces this exact
contrast - some layers of these three distributions differ
meaningfully (package management), while others have already converged
on shared tooling (init/service management), and a real deployment
naturally encounters both kinds of layer side by side.

WHY THIS WORKS AS AN ANSWER
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It restates the three distinct install commands from Step 1 and the
single shared command from Step 2, and explains the difference by
tracing each one back to whether that specific layer (package manager
vs. init system) is an area of genuine divergence or genuine
convergence among these three distributions, per Chapters 6 and 8.