One huge benefit to VanJS is it's simplicity. It is far easier to fork than most other UI component libraries. I did it writing relementjs & rmemo. I encourage others to fork it as well. VanJS is well written. You get a reactive state management library (on the browser side) & a UI renderer in < 150 LoC. Very impressive. I encourage anyone interested to experiment with this. It has been very fruitful for me.

In case anyone is interested, here are my forks.

https://github.com/relementjs/relementjs

https://github.com/rmemo/rmemo, which exports https://github.com/ctx-core/ctx-core/tree/main/rmemo. Note that rmemo also supports server side reactivity.