[fsflover]

You can choose sys-net to be a disposable during the install. It's not the default. You can also make it a disposable manually: https://www.qubes-os.org/doc/disposable-customization/#using...

Beware that your WiFi password will be forgotten every VM reboot (but there is a workaround on the forums).

[orblivion]

Thank you! (Yes I forgot that it was an option I chose; I probably went with the defaults, not knowing the implications of deviating)