Not a plot hole, but in 2015, Daniels probably doesn't find the monkey..
...nearly as quickly.
In the film, Daniels identifies the host monkey after boarding the Korean cargo ship and finding a Polaroid of the dead crewman posing with the monkey.
In 2015, very likely there would be no Polaroid cameras on-board ship, especially a Korean vessel - everyone would be using a smartphone to take pictures. And likely the phone would be password protected so Daniels would not have an easy time cracking it to see any photos.
Sure, a modern film might have someone around [a crewman perhaps] who was somehow versed in phone security cracking, but this would smack too much of a convenient deus ex machina to me.
In any event, I very much enjoyed this film when I first saw it in the theaters - what a spectacular cast! Just that, re-watching it recently, it strikes me that in the context of the film, our current over-reliance on technology maybe ain't such a good thing.
Similarly, I have personally observed that the advent of cell technology has indeed made me markedly dumber than I used to be in some ways. As a kid growing up in a world without cell phones, I remember I used to walk around with dozens of phone numbers committed to memory - my parents workplace, relatives, school, friends, emergency numbers...etc.
Nowadays, I might not even be able to tell you my mom's cell phone number even if my life depended on it.
:P :)
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"The greatest trick the Devil ever pulled was convincing the world he didn't exist."