We had to increase our cabinet height (after they were already DIY installed) because the height with 3cm granite would have been lower than the 36" minimum height of our new Bosch slide in range, by 1/2". And I wasn't about to get a lower range, b/c the Bosch is a beauty.
We put plywood on top of the cabinets (under the granite), and have matching cabinet trim to cover the plywood. The trim will be installed soon. It was the only fix for us and it works perfectly. Once the trim is up, it will be unnoticable.
Good luck.
Q