Also by using Musl and Alpine as a base the amount of software you can put in 700MB it's huge.

With 700MB, IceWM and ZZZFM you could fit half a CD even with all the X.org drivers installed and you could fit Abiword, Gnumeric, Seamonkey, Dillo and so on with ease.

Offering an alternative with Linux-Libre will be interesting too, as often the Libre kernel works faster than the vanilla one, and legacy computers have all the drivers working. Propietary drivers won't work anymore such as Nvidia which some of the older ones might not even compile with DKMS.