Vue.js is the only frontend framework that I have some clue about, and the first blog post when googling 'Vue 2 to 3 migration' [0] says it took them 4 man-week

Vue.js is the only frontend framework that I have some clue about, and the first blog post when googling 'Vue 2 to 3 migration' [0] says it took them 4 man-weeks to migrate their product. From my limited experience, the main issue is that it's really hard to ensure frontend actually works as before, after upgrading frontend libraries/frameworks, outside of having really extensive end-to-end test suite. [0] https://crisp.chat/blog/vuejs-migration/ https://crisp.chat/blog/vuejs-migration/