tl;dr: Shopify is migrating its mobile apps (Shop, Shopify, POS, Inbox) from React Native back to native Swift and Kotlin, reversing its 2020 decision because LLMs have made maintaining two native codebases far less costly. They're doing greenfield rebuilds using an internal agentic system called Helix that works in reviewed checkpoints, plus a CLI-driven architecture that decouples business logic from UI for fast agent iteration. Shopify will wind down support for its React Native libraries (Skia, FlashList, Restyle) through 2026, seeking new stewards where possible.