I choose to host on Vercel because I can spin up a production-ready, globally distributed web app in about 5 minutes with marginal, predictable costs without hiring a single other person, procuring any hardware nor learning anything beyond what’s necessary for coding my application. Pair it with analogous services like Upstash and Fly.io for persistence, and you can achieve incredible scale with minimal operational burden. Obviously this depends on your workload - for mine I can imagine this would cover the majority of use cases for the lifetime of my company. And there are many companies like mine.