readme.md

@@ -1,6 +1,13 @@
 # Tailscale on the Steam Deck
 
-This process is derived from the
-[official guide](https://tailscale.com/blog/steam-deck/), but with some tweaks
-to make the process smoother and produce an installation that both (1) comes up
-automatically on boot and (2) survives system updates.
+This process is derived from the [official guide][official-guide], but with some
+tweaks to make the process smoother and produce an installation that both (1)
+comes up automatically on boot and (2) survives system updates.
+
+Some key points:
+
+- The Steam Deck uses an immutable system partition with an A/B update system.
+  If you don't work within the writable lines, your changes will be lost on the
+  next update.
+
+[official-guide]: https://tailscale.com/blog/steam-deck/