To me this is one of the great mysteries of computers: Why don't people use these features more? I have tons of Services that I use all day, for me they're one

To me this is one of the great mysteries of computers: Why don't people use these features more? I have tons of Services that I use all day, for me they're one of the most important features of the OS (archiving text, opening all selected URLs, and converting the selection to title case are some examples). Yet Services don't seem popular, why is that? People seem to customize their shells (e.g., write Bash scripts, make aliases, and customize their prompts), and even non-programmers seem to be able to accomplish complex automation in Excel, or with a tool like Zapier. So why don't people customize their OS similarly? I find the gains to be greater, because if I customize at the OS-level, my customizations are useful in any app, and forever, instead of being tied to a particular app or project.