Block’s @owenbjennings describes the "complete paradigm change" he's seeing in software development: "The basic way development used to work is that you would have a product manager, a designer, 6-8 server engineers, 2-4 client engineers, and you would kind of sequentially work on a feature in a waterfall fashion. A medium-sized feature would take 4-6 weeks, you would ship that, move on to the next one." "It's fundamentally different now. Now we have really small squads of 2-3 people who are…