Yes, since our universe is the only one we have reasonably reliable information about.
Well, one can only speculate about what kind of technology is available in another universe.
In another fantasy (unfortunately
available in German only - perhaps someone here would like to translate it to English?) I described a dialogue between God and John von Neumann, where God talks about using machinery where already the addresses are (infinite byte) real numbers rather than 64 byte integers (and most likely computers are capable of an infinite number of Turing computations per unit time), thus leaving a host of possibilities theoretically explored in our universe under the name of
hypercomputing. In such an environment, (my toy universe and) the universe we live in can be simulated in finite time, I guess. On the other hand, God describes Eternity (the name of this universe) to von Neumann as timeless, time itself being a simulation product. How to comprehend this is beyond my imagination.