Is there a skill cap in New World?
The maximum weapon skill is 19, meaning you can only acquire 19 points for your weapon. It means you can take every single point in a single weapons specialization, typically leaving one spare to go into the weapon specialization.
Can you max all stats New World?
No you cannot. I watched something that demonstrated how it worked. When you level up in NW you get AA style points to invest in anything you want. At present you can invest in your camp, housing, weapons, armor and harvesting tools.