We currently use parcel for bundling the mongosh executable, but there are many reasons to migrate to webpack:

• We’re using an unmaintained version of parcel
• Webpack has much wider adoption and broader support
• In other places, we use webpack almost universally, including other mongosh packages
• Webpack does, unlike some comments in the codebase indicate, support our monorepo structure
• Webpack supports plugins like terser, which could help with speeding up startup times
• Parcel is problematic w.r.t support for ESM and newer Node.js modules, requiring us to monkey-patch its internals