Most React codebases benefit from the simplicity of functional components, because they fit into the model most people have of websites + web apps. If you’re doing anything complex, you’re in a very small group.
Class components are just (IMO) cleaner, and I find myself saddened at the level of disarray most codebases with hooks are nowadays. Enough has been written elsewhere about how hooks require one to keep more in their head; class components have an agreed up layout/structure/etc that is important in large codebases.
It's just frustrating. Couldn't they have had the decency to fork / rename React for all this and leave the old branch to die instead of turning the entire space into some kind of pedantic war-zone for several years?
IIRC They reported that hooks were a common source of problems.
Visually they look simple but they hide a lot complex and nuanced semantics. Once you start layering and composing it becomes hard to reason about when a value updates, when a re-renders will occur, and when a value even resolves(it may take many re-renders for a value you need to finally get set).