It seams tempting, because Silverbullet does look nice, but unless you want to become a maintainer I would not recommend you adopting it. Every maintainer is always just one step away on losing interest. There can be external factors like job change or internal factors like another interesting project. Both you have no control over and both are totally fine, because the maintainer doesn‘t owe you anything. Also especially in web dev the next breaking update requiring a lot of rework is just around the corner.

TLDR;So try it out, may be have a look at the code, but don‘t make yourself dependent on it.

Do you know about drip? It as local non-profit cross-platform open source smartphone app and my girlfriend is a happy user for years.