On Twitter, Watsky described the album's thesis statement as a message "that embracing our insignificance in the vastness of time & space frees us to be joyful."

[3] The lead single, Stick to Your Guns featuring Julia Nunes, was released on July 1, 2016, as a free download on Watsky's Bandcamp page.

This is not the first time Watsky premiered music right before the album through Genius; a similar promotion was done for the release of Cardboard Castles and All You Can Do.

Andy Kellman of AllMusic gave the album a three and a half out of five stars, adding that "Ultimately, this is his brightest, most accomplished release yet."

SputnikMusic user RedHotRedd gave the album a similar score, saying "It seems as though Watsky really wanted x Infinity to be his best effort, and it most certainly was."