Ask your users how they’d feel if they could no longer use your product. The group that answers ‘very disappointed’ will unlock product/market fit.
Once you have a defined segment of ‘who is gonna miss badly’, start building the persona of those users.
They are your true ‘early adopters’.
After all, in the end what matters is how madly do your users love your product (and not just ‘like’ it).
Going by this definition, how many of you have achieved the real ‘product-market fit’?
(Great perspective by Rahul Vohra of SuperHuman)