That's the old Vue 2 repository, which has been pretty inactive for a while due to the full rewrite of Vue.
Vue 3 (70.62% acceptance): https://merge-chance.info/target?repo=vuejs/vue-next
Svelte (57.23% acceptance): https://merge-chance.info/target?repo=sveltejs/svelte
React (45.99% acceptance): https://merge-chance.info/target?repo=facebook/react
Angular (1.63% acceptance): https://merge-chance.info/target?repo=angular/angular