This makes me believe simulation theory even more tbh. Quantum mechanics exist to fuse operations, altogether making simulating our universe more computationally inexpensive.
...we don't think about it this way often because we'd be thinking about computational problems so huuuuge that we'd be like the quarks inside the atoms inside the transistors inside plannet-sized clusters spanning galaxies to even fathom computing it ...and it's not necesarily a feel-good perspective :)
I mean, even the speed-of-light limit and general relativity seem like optimizations you'd do in order to better parallelize something you need to compute on some unfathomable "hardware" in some baseline-reality that might not have the same constraints...
...and to finish the coffee-high-rant: if you want FTL you probably can't get it "inside" because it would break the simulation, you'd need to "get out" ...or more like "get plucked out" by some-thing/god :P (ergo, when we see alien artifacts UFOs etc. that seemed to have done FTL... we kind of need to start assuming MORE than _their_ existence and just them being 'more advanced' than us)