According to Statista, the most popular software development models of 2021 are:
DevOps - 36%
Agile - 32%
Kanban - 13%
Waterfall - 10%
In 2020, 62% of teams adopted the DevOps model to reorganize their workflow and meet the company's needs. Agile is stepping on DevOps' feet with 71% possibility to reduce production costs and the same number of organizations adopting it. As for the Waterfall, its success rate is equal to 26%, leaving DevOps and Agile as true methodology leaders.