Actually the topology there could be better ! If one of my students handed me that, they'd pass, but not with an A grade ! 😉 Let's look again, and see if we can make that A* !!
I have tolerated a number of triangles and ngons and degenerated quads in the transition section between diamond form and not, for 2 reasons...
1. I was tired, and I was getting nice SDS surfacing regardless. I love how tolerant our SDS is sometimes !
2. I used a solid bevel on (and flattened) all the diamond faces so that they were protected / reinforced against contamination from those rogue elements when SDS was active, where they are confined to the narrow rims at top and bottom of that section where they don't really get seen.
So really this is the answer in a time-pressured world where we need to get stuff done quickly in a way that looks fine to the client.
Were we to spend a bit more time and effort we could resolve all the topology issues like this (forgive my wonky lines ! ) to restore 100% quadly excellence...
...which gets us supremely clean results when turn the subdivs back on...
CBR