Frankly I don't know. The Manifesto itself is not very clear about it. I've worked in agile and non-agile companies, but none used a waterfall model. If anything, agile adoption always meant more process (stories, standups, planning, retrospectives, etc.) rather than less. Before or without agile, the structuring of work has been mostly the same, albeit without the formal process defined by this or that agile methodology (to be fair, scrum is the only one I've ever seen).
Frankly I don't know. The Manifesto itself is not very clear about it. I've worked in agile and non-agile companies, but none used a waterfall model. If anything, agile adoption always meant more process (stories, standups, planning, retrospectives, etc.) rather than less. Before or without agile, the structuring of work has been mostly the same, albeit without the formal process defined by this or that agile methodology (to be fair, scrum is the only one I've ever seen).