99% of the time I hear people talk about product-market fit in crypto

If the question needs to be asked, it hasn't! Seriously -- Product/Market Fit means the market is pulling product out of the company faster than the company can make it -- it's unmistakable when it happens.

Related
https://warpcast.com/pmarca/0xaa98d2bb

are there products which have steady growth but never had that unmistakable pull you think? Took decades but kept growing?

Craigslist perhaps?

Unlearning. Full time product manager. Part time builder/tinkerer on farcaster. Bots: @nftsoffc.

Best example I can think of is Roblox. 

But the point is when you actually hit pmf, you’ll know.