Does Hologram support two way data binding?

That’s one path to take for sure. LV does the same. I’m using solid.js at work and they recently had a discussion on the design of v2, where they were looking for removing such special cases – which is the less brittle option. But my point was less in favor of one or another solution, but the fact that one needs to be aware of that stuff as a maintainer for an abstraction over html and where there’s deviation from the norm (usually those templates do not set properties) it needs to be well documented.