01 Business value
Fewer critical bugs in forms and API contracts, easier maintenance a year later by a different team, and more predictable refactoring.
02 Where it's especially useful
Complex client portals, carts, calculators, CRM/payment integrations, and component design systems.
03 A painless start
Enable strict mode gradually, type public APIs, and add a linter to CI. There's no need to rewrite everything overnight.
