Jeff is one of the earliest participants in the Odoo open source community, with nearly 20 years of experience in Python-based open source ERP technical services. Through a comparison with WordPress, this talk introduces the 20-year journey of the Odoo open source project as Python's killer application in the enterprise IT field, covering its evolution, open source logic, technical characteristics, ecosystem building and future prospects. It encourages Python developers who value elegant code to gradually transition toward professional technical services as AI reshapes the software product market.