I think the bigger concern is what to do when it needs replacement. Flush mounting will seriously limit your options. I initially thought I would flush mount my Miele 30", but the fabricator cut the granite for proud mounting without asking me and I'm happy he did it. I think there are pros and cons for both methods regarding cleaning. I think the flush mount can look cleaner, but it has to be done perfectly, there is more room to hide small errors with overlap mounting.

Good question. I was debating the same and need to look up the install for flush. I agree, if it's flush seems like chipping isn't an issue. I wonder if crumbs and water can get into the cabinet though, especially with spills

Some companies won't do flush mount and the replacement issue is huge- I've had to replace my induction cooktop with a new brand and the top mount made it a lot easier to replace in the same hole. It looks fine and I don't have a problem cleaning it.

It is a challenge to flush mount since the counter needs to be routed out the exact dimensions of the overhang. This is why most don't go to that effort and let the glass sit on top of the counter.

We thought about it and weighed the pros (looks) and cons (everything else) and decided to go with the stainless framed model.