diff --git a/roles/1-prep/tasks/raspberry_pi.yml b/roles/1-prep/tasks/raspberry_pi.yml
index 163fa9299..232674dca 100644
--- a/roles/1-prep/tasks/raspberry_pi.yml
+++ b/roles/1-prep/tasks/raspberry_pi.yml
@@ -31,19 +31,26 @@
 #    line: 'include btcfg.txt'
 #  when: is_ubuntu
 
-- name: '2021-07-27: SEE ALSO ~3 networking packages LATER installed by https://github.com/iiab/iiab/blob/master/roles/2-common/tasks/packages.yml'
+- name: '2021-07-27: SEE ALSO ~4 networking packages LATER installed by https://github.com/iiab/iiab/blob/master/roles/2-common/tasks/packages.yml'
   meta: noop
 
 - name: '2021-07-27: SEE ALSO 4-5 networking packages LATER installed by https://github.com/iiab/iiab/blob/master/roles/2-common/tasks/network.yml'
   meta: noop
 
+# 2021-07-27 explanation from @jvonau: The 3 BELOW (iw, rfkill, wireless-tools)
+# are provided by RaspiOS.  Ubuntu|Debian on the other hand are hit or miss:
+# desktops might have some/all 3 preinstalled, while servers tend not to have
+# these present at all, but are needed to be installed if you want to take full
+# advantage of WiFi on Ubuntu and friends -- but it's only enforced on RPi
+# hardware where we know in advance of the likelihood of WiFi being present.
+
 - name: 'Install packages: cloud-guest-utils, dphys-swapfile, fake-hwclock, iw, rfkill, wireless-tools'
   package:
     name:
       - cloud-guest-utils    # Contains 'growpart' for resizing a partition during boot, which is normally done with the aid of cloud-init
       - dphys-swapfile       # 2021-07-27: RaspiOS installs this regardless -- autogenerate and use a swap file
       - fake-hwclock         # 2021-07-27: RaspiOS installs this regardless -- save/restore system clock on machines without working RTC hardware
-      - iw                # 2021-07-27: RaspiOS installs this regardless -- configure Linux wireless devices
+      - iw                # 2021-07-27: RaspiOS installs this regardless -- configure Linux wireless devices -- hard dependence for ap0 creation, SEE https://github.com/iiab/iiab/blob/master/roles/network/templates/hostapd/clone-wifi.service.j2
       - rfkill            # 2021-07-27: RaspiOS installs this regardless -- enable & disable wireless devices
       - wireless-tools    # 2021-07-27: RaspiOS installs this regardless -- manipulate Linux Wireless Extensions
     state: present