Many people like existing BeOS/Haiku design and don’t want it to be broken. If such people will not say anything, it will create wrong impression that everyone agree with changes.
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Modern desktop GUI design becoming more smartphone/tablet-like is an absolute disaster. For the beginning there is fundamental difference between mouse-keyboard device and touch screen device. Mouse-keyboard device (Personal computer) allows more precise control and serves professional productivity purposes.
It’s a trend doesn’t mean its desirable, just like flat design. There shall be some communities stand out to restore the original order of tech industry.
Recently the HarmonyOS computer from Huawei is released, and its only being regarded as “Tablet XL” but not a real PC. Mainland China is a society with wider use of touch devices than PCs, and people still dislike the idea of turning PCs into tablets with keyboard.
The idea of turning desktop GUI design to become more smartphone/tablet-like never works.