I fear that you have figured out how I learn things. The tool scratches an itch so I keep using it to scratch with until I no longer itch. By that point it is part of the repertoire and gets trotted out as needed. If at any time it aggravates you or is just noise instead of signal, just let me know. I will tone it down. Until then….full speed ahead. BTW, the problem that it solves is, as you hint, the need for more than text alone to respond. In my discipline, rhetoric/comp/lit pedagogy, the idea of critical stance is so important. What multimodal comments give you is a different place to stand.