Is it ok to use milk in coffee or does it ruin the taste of real coffee?

Milk or e.g. oat drink can be used and does not spoil or completely lose the coffee’s own taste, even if it masks the finest nuances. You can tell the difference between good and “ordinary” coffee even if you drink it white. However, you should try drinking specialty coffee black, even if you are used to drinking with milk. The taste may surprise!