Absolutely.
Regular caffeine consumption can lead to physical dependence. This means that someone who suddenly stops consuming caffeine after using it regularly may experience withdrawal symptoms.
Headaches are particularly common, along with fatigue, irritability, difficulty concentrating, or a general feeling of being sluggish.
These symptoms can make people believe that they "need" coffee to function.
In reality, some of that feeling may reflect caffeine withdrawal rather than an underlying inability to function without coffee.
This does not mean coffee is inherently addictive in the same way as substances associated with severe substance-use disorders. But caffeine dependence is real and can be uncomfortable.
Anyone who wants to reduce caffeine may find it easier to gradually decrease intake rather than stopping abruptly.
Coffee Does Not Replace Sleep
Perhaps the most important point is also the simplest.
Coffee can make you feel more alert, but it does not erase the biological need for sleep.
If you are chronically sleep-deprived, caffeine may temporarily improve your ability to concentrate, but it cannot fully restore the cognitive and physical functions provided by adequate rest.
Sleep supports memory, emotional regulation, immune function, metabolic health, and cardiovascular health.
Using coffee strategically can be useful.
Using coffee to continuously compensate for inadequate sleep is a different matter.