We have cataloged planets in hundreds of other solar systems. We see ones with only rocky planets. Ones with only gas giants. But we're the only one we know of

We have cataloged planets in hundreds of other solar systems. We see ones with only rocky planets. Ones with only gas giants. But we're the only one we know of with both gas giants and rocky planets. The only one where the rocky planets wind up protected from most of dinosaur killer kinds of impacts. Right, because that’s what or current techniques mostly allow us to find. Big planets close to their primaries are most favorable for techniques based on transiting such as light curve analysis. Drawing conclusions based on limited data with primitive tools is a poor notion though, and it tells us nothing about the typical makeup of extrasolar systems.