I'm not sure if I want to keep reading this. If one random dude can link that world with his original world, why hasn't this been a greater thing already? Also, a large part of why I read isekai manga/watch isekai anime is to see the main character's response to a new world, with not much of a frame of reference to their old world. I don't like seeing the character bring much more than their wits to the world, but I'm fine with items that would typically break down/run out of battery when they do exactly that. It really cheapens the whole 'isekai' theme they have going on if they suddenly have more or less full access to their previous world, and could probably go back whenever. Thanks for listening to my TED Talk.
TL;DR: I don't like when isekai give characters unlimited access to the internet.
TL;DR: I don't like when isekai give characters unlimited access to the internet.