It makes sense, but you forgot to add in the war. We haven't even discussed how long it lasted, and as I put forward before, what survived it. I want to entertain the idea that the war set us back, that magics were used during it to flat out destroy not only the tech itself, but the know how to use/make it. 

As for the "Modern" I vaguely remember us agreeing on a more advanced setting, maybe 50-60 more years advanced than we are now, but only in certain fields, since as I said, development in some areas remained more intact after the war than others. As an example, if at some point during the war, the intronet highway was completely wiped out by a customized spell, and all knowledge of how it works was erased from both mind an text(Remember, this is an example) then after the war, people would remember it, but they would have to not only re-create it, but they would have to do so in a world where such things are not a major concern. The control and enslavement of the magicals would take precedent.

Or, a less extreme example, all car factories in the world were destroyed in a mass combined effort, after the war we could say people more focused on making/using motorcycles to get around on since they are easier to make and maintain. Sure, there are cars in the era now, however they are not hover cars because that tech was not important. I can see auto driving and the like, stuff we don't have yet, but I don't see our world having hover cars. . . .But again, this is an example. Like, the hand held music devices, not important, and they may exist not in the RP, but because they are very much non essentials, they would not be that far advanced.

So yes, what you say makes sense, but do you also see my logic? Also, we really need to decide how long the war lasted. . . .