Techies loved them, there were articles about Soylent all over HN. Soylent itself got backing by Alphabet and Anderseen Horowitz.
I haven't heard about Soylent that much lately, however, and the buzz (or hype?) seemed like it died off.
Reading an article on Yahoo! about them, it seems like they pivoted recently, with CEO from Kraft. Which made the company profitable for the first time.
https://finance.yahoo.com/news/soylent-once-beverage-tech-bros-143516284.html