An Occam's Razor-like approach to the question of the finitude of the universe

The universe is simply a system. A thing.

A thing is not infinite. The thing is limited to the thing. The pineapple is the pineapple but not the avocado. However both the pineapple and the avocado are things, both are parts of existence.

Existence, being all things, is infinite as existence is not limited to any particular.

https://www.ilovephilosophy.com/t/existence-is-infinite/81126