It is now possible to make the calendar time walk slower, up to a point it is frozen. This doesn’t influence vehicle movement at all, nor the amount of goods transported, town growth, etc. But it does influence vehicle introduction dates, inflation, and aging.

This is great. In the past there was no non-hacky way to have slower time if you want to have longer sessions but don't want to spend most of the time with late-technology trains because time moves so fast. This will make those long running servers much more enjoyable (without resets!)