Are building plans with a 1m knee wall still up-to-date?

Correct. But the same roof pitch with more eaves height results in greater overall height.

However, with more eaves height, the roof does not have to be as steep to create living space.

More eave height also results in a "bulkier" building volume, the "high-rise" was of course meant symbolically.

Does a dormer that extends the eave-side facade upwards by 50% of its length appear significantly less "bulky"?

Does a dormer that extends the eaves-side facade upwards by 50% of its length appear significantly less "massive"?

The limit is usually one third, and even that often leads to complaints. I find any bulge unnecessary that is primarily a hump, wart, or bump. But I am also a confessed half-octagonal bay window "hater".

Apart from that, the eaves height is also a dividing line between facade and roof windows, and with high knee walls one can definitely do more harm than good. Sensible knee walls in a dormer window are between about (clear) 1.0 and 1.2 m above the top edge of the finished attic floor.

Hello 11ant,
could you perhaps briefly elaborate on the "more harm than good"?
In what way could we possibly be doing ourselves a disservice with the planned utilization of max. 1.3 m?

You have incorporated the content of the bold disservice into your quote of my contribution: A eaves height is always also a pivotal point or a dividing line: a window on the eaves side either has its lower edge above it (as a roof window) or (as a facade window) its upper edge below it or is located in a dormer - also with the additional experience as a former window manufacturer, I advise against running windows continuously over the bend between facade and roof. Exceptionally, the mainstream and I agree once: dormer windows spanning the knee wall were a one-day fly about forty years ago and became less modern than shoulder pads thirty years ago. With a knee wall of 130, I do not see the problem as dramatic that one then has the eaves height as a "beam in the view": depending on the position of the person in the room, this still remains within limits even with a knee wall of 150. Knee walls in the "window" 160 to 200, however, in my opinion, are in the unfavorable range.