I evaluate it based on a few things:
- Will it make my life easier as a developer for the majority of apps I might create?
- Will it mean I can build rich/cool user experiences without having to write much JS?
- Will it mean it might take less time to build my app/s?
- Will it mean I don’t have to keep two (or more!) languages in my head while building my app?
I don’t think I’m the only one who loves the idea of LiveView either, Drab, the Phoenix library that is similar to it, actually has the largest thread on this forum in terms of total number of posts (plus loads more in threads tagged with it)… which tells me that there is a lot of interest in this type of library 
