I actually went through really severe caffeine withdrawal last year, it turns out that the always-ready coffeepot at our coworking space was keeping me way, way more caffeinated that I could reasonably do at home

I also spent the year stressed out by the endless stream of Slack messages, eating poorly, forgetting to take breaks, and slumped on a couch rather that bothering to use my nice ergonomic chair, so, YMMV