I do both! Tea as well.

Coffee I like when I’m sitting at a desk doing busywork for a long time. Tea I like for many reasons, it has more vitamins and minerals than coffee, more flavor diversity, and anti inflammatory properties.

Caffeine pills I take in the morning if I just want to get moving quickly, and I also use them as a pre-workout instead of those expensive powders.

I could just use (and have just used) pills instead of coffee, and it works just fine. However, they literally just hit different. The pills are all at once and then it wears off slowly, coffee lets you ramp up at any speed and maintain at any level. It’s mostly just preference, but being able to spread out the same amount of caffeine is very handy. I would be interested in slow-release caffeine pills, although I imagine these would be very dangerous for some people.