I think the whole thing is probably a matter of taste visually. We also initially considered extending it completely upwards, but in the kitchen builder’s example picture, the half-height version looked very discreet, which is why we are currently leaning more towards that.
Recessed wall cabinets are present above the 50 cm cabinets, but I left them out of the drawing since they have no impact on the water installation. A visualization already exists, but it is only in the hands of the kitchen builder (The kitchen studios including furniture stores are very strict about this, visualizations are not released before the order is finalized).
Would the sketched water installation be feasible in your opinion? I would assume that a plumber can simply shorten an existing pipe? (This would be necessary for the hot water pipe).