SEO is still not outdated, techniques have been improved to go with digital marketing. Social media playing a major role in ranking websites and spreading the news are more strong way of ranking your websites.
I don't think SEO will ever be outdated as long as people continue to use search engines. I think the only thing that people are starting to notice is that there are less tricks and solutions to get to the top. Rather, SEO is more of a byproduct than a process now, one that comes with good content and a loyal fanbase. But it's definitely still present, just in a slightly different form.
Keywords that support customer targeting
SEO copywriting and on-page optimization
Link attraction
Internal link optimization
Technical SEO (anything designed to make your site more accessible to search engines)
Optimizing for engagement and conversions