Caffeine is a central nervous system stimulant of the methylxanthine class. It is the world's most widely consumed psychoactive drug. Unlike many other psychoactive substances, it is legal and unregulated in nearly all parts of the world. I am buying Clinchfield because I feel I owe DoveTail a apology and i'll pay for a DLC for it.
Whatever your reasons for getting it, I do think Clinchfield is a must-have for anyone who enjoys diesel locos, and a variety of gradients, branches, and tasks. The setting's really nice. I had hills and woodland where I lived as a kid, but sadly the trains went through the next village over.
Caffeine can be replaced. Some substitutes and their excessive consumption can lead to living close to trains (e.g. at railway stations) and even inside moving freight trains.
Coffee, it's the only drink a player needs, extra strong with no sugar... Being on nearly 1100 driver levels, I've drunk alot of coffee...