After such a long period, the pizza may have undergone freezer burn, which is the dehydration and oxidation of food caused by improper storage. Freezer burn can affect the texture, flavor, and overall quality of the pizza, making it less enjoyable to eat.
Moreover, the pizza's extended storage in the original delivery box raises concerns about food safety. Cardboard boxes are not designed for long-term freezer storage and may not provide adequate protection against contaminants or maintain the necessary temperature to prevent bacterial growth.
To ensure food safety and the best quality, it is generally recommended to consume frozen pizzas within a few months of freezing. If you have any doubts or concerns about the safety or quality of the pizza, it is advisable to err on the side of caution and discard it. It's always better to prioritize your health and opt for fresh, properly stored food.