The Prior Plague may be partially supernatural in nature, so it would probably still defeat even our modern methods of defeating normal diseases. Without the extradimensional help, we'd almost certainly struggle.
Modern tech itself has caught in up in some ways, and not so much in others. For example, many of Earth's Stargate control mechanisms are even more woefully out of date than they are compared to today. Your average smartphone is leagues faster than the supercomputers that they had hooked up to the gate.
We kind of see this in Atlantis, where they could get away operating Atlantis and the Atlantean Stargate with just a few laptops (admittedly, having the DHD there also helped).'
The Kino is just a regular drone, nothing particularly special or alien, and I could see things like the MALPs the SGC used to check gate conditions being woefully out of date. Just stick a few sensors to a drone, and fly it through the gate. It's both faster and less hassle.