There’s a middle ground. Locus for example, has maps available that are digital versions of the USGS sectionals those of us who are in the US are familiar with. I recently got turned around in the Rangeley Maine area (three parralell trails, we'd been offf the main trail, sidetrail to a pond, got back onto the wrong one. Lay of the land was right, but cascades at stream crossing looked wrong (photographer, so I notice framing). Left the phone in favor of map / compass, really missed being able to quickly see what trail we were on. Thick forest, no long views (excepting that pond).
Contawise, with those digitized USGS maps on a phone screen the main thing I'm missing is the big picture - unless I squeeze in which blurs the elevation lines.