Rich snippets and schema have been regarded as an advanced SEO technique that should be at the pinnacle of your SEO campaign. This powerful bit of HTML markup is an essential element that is read by search engine crawlers to provide information to searchers before they even click on your search result.
Today it's super important, tomorrow they will be testing something new. Optimize your site and concentrate on good content. Those two things will always be important whether rich / featured snippets are still a thing or not.
As per the current trend, Google and other search engines are providing a piece of website information in featured rich snippets box to their users. Schema markup is the best technique to provide your website information with properly structured data to search engines and get your website information in feature snippets box on Google's SERPs. you can check all schema markups are properly implemented or not on Google's Structured Data Testing tool: https://search.google.com/structured-data/testing-tool