Indeed, thus “another approach” :) There are several different approaches trying to tackle this same problem in the space, some further along than others, and typically all with different tradeoffs and at different points in the system. e.g. Lightning is arguably addressing some of these issues as well, but at a different point---on top of Bitcoin, rather than instead of.

I called out Coda because it's both an independent system and aimed at a very similar set of issues, but it's absolutely a different approach. Figured it might be of interest to folks who were looking at this article.