Waydroid – in my experience with both SFOS and Ubuntu Touch – is a real power hog, so using it constantly, e.g. for a messaging app, really shortens a device runtime. Like down to a few hours . . . Right now, that would be my only use case: communicating on a country-specific messaging app with my daughter 14 time zones away doing language immersion or my son with his Garmin Bounce Jr. watch when he’s roaming the neighborhood. (Supporting my little local GPS device maker.)
If one only needs to use Waydroid it occasionally, that’s probably not an issue.