To the topic at hand, that is a lot more ports and WAY more routing horsepower in same 1U as an RB1100AHx4.
My issue with RB1100AHx4 today is that it is NOT a great value… since even one RB5009 is way more powerful than a RB1100AHx4. And two RB5009 is only marginally more than one RB1100AHx4…