There are a two trends in Jamstack that seem to be having a quick impact, as can be seen by this week's links.
The first is the concept, first introduced by Next.js (I believe), of Incremental Persistent Rendering. This is essentially "on demand" page rendering that is especially critical for large sites with long build times. Netlify recently released their Distributed Persistent Rendering recently, which essentially achieves the same result.
The other is an increasing adoption of Jamstack + Wordpress rather than the Jamstack vs. Wordpress that so recently dominated the discussion. Gatsby seems to be leading the way with their plugin and starters, but there are a lot of other tools and services now supporting a similar architecture.