I don't post a lot of plant combos but in order to tag I need to transfer the photos from my phone or iPad to a laptop and then go through the posting process. The one time I did that I realized I had transformed a joyful experience (look I actually have a pleasing combination!) into a slog. If tagging was required I would not post combos.
I appreciate the tagging that people perform but this feature is just not universally available nor easy to use. If there was a simple way to just list the plants in the photo rather than box the locations, this would make tagging more accessible and perhaps more user friendly