If you are building a core product, such as Spotify's Discover Weekly. Then no question, you need a dedicated team, and substantial commitment. Maybe even a PhD or two.

But as an unabashed Angolia devotee, I think the value prop of InstantSearch is a no brainer. It's worthwhile looking at the product itself, as an almost textbook example of how to package services to enterprise customers.

https://www.algolia.com/products/instantsearch/

https://www.algolia.com/enterprise/customers/