(Founder here)

That's definitely the biggest risk to the business (other than competition).

Airtable seem committed to being a platform that third-party developers can build businesses on, in the same way Shopify are. So I think (hope) they'd acquire me, rather than just cloning it, to maintain their reputation as a platform. But they definitely could do this and it's pretty scary!

For now, my strategy is to try and grow to $350k+ ARR and diversify the profits into index funds etc. I also have a couple of other micro-saas ideas that aren't platform-dependent that I'll launch in the next couple of years.