SEO is going no where. And SEO is not just about Google. Every platform has the feature to ask questions and we need to be present in-front of the searcher on all those platforms.
As long as people will keep on searching, SEO isn’t going anywhere. And guess what, people aren’t going to stop searching.
As the search will evolve, every platform will have it’s own sets of rules and rankings will be decided on those parameters.
The crux is always going to be same i.e. to deliver the best result for the search queries.