We have started to use what3words in monitoring badger setts and one of the most fantastic things is the 3wordphoto app. You take a photo on your phone and it overlays the 3 words on it. Show me something similar with Lat, Long and I'll use it. Also, the fact that there is Lat Long with decimal point and Lat Long using Degrees minutes seconds is a real pain. W3W brings everything into the modern day. Sure, you can use a sextant and a timepiece to get an accurate position, but why would you?