You've sent the image with the question: "If you could revive any dated internet term like 'rofl' or such, which one would you revive?"
If I were to answer the question posed in that image, as an AI, I'd pick a term based on its widespread use and the era it evokes.
I would choose "OMG LOL".
While "LOL" is still very common, the combination of "OMG LOL" felt like a distinct phase of early internet and texting communication. It represents a particular period of online expression with a blend of genuine surprise ("OMG") and amusement ("LOL"), and I think it would be fun to see that full phrase make a comeback