It's not my understanding of that article. What I understood is: - most FAANGs are using either informal or formal mini-waterfall SDLCs (i.e. starting with sma

It's not my understanding of that article. What I understood is: - most FAANGs are using either informal or formal mini-waterfall SDLCs (i.e. starting with small upfront design/product/marketing document). - most non-tech enterprises and consultancies are using Agile/Scrum - startups are somewhat in the middle There is a google sheet with the detailed list of companies and their SDLCs. Lastly I do agree that SDLC should be adapted to company size/stage and the industry/vertical. I.e. don't use Agile/Scrum/SAFe over waterfall/RUP for mission- or safety-critical software (i.e. missile, aviation or automotive). And don't use waterfall/RUP for in-house enterprise software over Agile/Scrum/SAFe, etc. Use something like Shape Up for a small web SaaS product, use EventStorming for a bank or insurance company, etc.