Digimap, that’s what I mean, an interpolated DEM made up of 10mt pixels based on points that are 90mts apart is fine if you want to know roughly how much elevation you have climbed or lost etc. But as you say you have to explain what the data is and where it comes from, most users don’t know this though, and don’t care.
My MSc dissertation was modelling past environments based on a DEM I generated (using a Kriging or nearest neighbour algorithm I think.. was 5 years ago!!), so am aware of the power of interpolated datasets… along with the drawbacks and issues.