Why I stopped using exceptions for control flow in my .NET 8 APIs

Why I stopped using exceptions for control flow in my .NET 8 APIs For a long time, my .NET APIs looked like this: public async Task Product > GetByIdAsync ( string id ) { var product = await _collection . Find ( x => x . Id == id ). FirstOrDefaultAsync (); if ( product is null ) throw new KeyNotFoundException ( $"Product with id ' { id } ' was not found." ); return product ; } And in the endpoint: app . MapGet ( "/api/products/{id}" , async ( string id , IProductRepository repo ) => { try { var