Meteor is fullstack, so you can reuse code on the front- and backend, which is nice for validation and business logic.

In the last ten years I worked for more than a dozen startups that based their business successfully on Meteor. Some of them got big and none has regretted it.

I have worked with Nuxt.js, Sapper (now Sveltekit), Play Framework an many more; all great, but for many projects I would still consider Meteor the strongest contender.