I hope you don't think I am criticising you, or your writing. You are obviously a very skilled writer, and have found what works for you. I also think that the tips you provide are really useful, and clear. I worry that inexperienced writers might get bogged down in descriptions that don't move the story onward, when a simple *he said* might be better used (every now and then, NOT every time that someone speaks). I am not against the use of description of action instead of tags - I use this myself with tags too. I have even written a story with no tags or description (just dialogue, with only two words happening outside of quotation marks). That works too if you have distinct voices. (if you are interested it was written a couple of years ago https://brucearbuckle.com/2015/10/19/one-beadh-of-a-trip/).