Horizontal websites are not universally embraced by the web design community, and I think it's mostly because they are not for every type of website or public. They work well with portfolios and galleries, but require a little knowledge (or imagination) of how navigation can work.
There are some excellent examples of successful horizontal navigation, using grab or simple scroll:
Great examples of gallery: Candice Holloway (literally) and Elfletterig
Personal sites and portfolios: Vanty Claire, The Horizantal Way, Lucuma, among lots of others.
The biggest challenge is how to make these sites intuitive enough. I found myself wondering how to make some of them work, and feeling a bit frustrated checking for scrollbars, buttons or dragging options (seems like lots of them use parallax effects).
In the case of infographics, horizontal scrolling should work perfectly for timelines. This is a common association (time "moves" from left to right, not in all cases but in most). So it depends on what kind of information you are displaying (you wouldn't use horizontal scrolling for a deep sea or atmospheric infographic!). I would only go for horizontal when there is a process involved in the representation, a development of events or facts. But mainly, I would make sure the site is easy to navigate, because the whole point of making an infographic is simplifying information.