I think and installer not only have to been impressive visually, it have to be practical and gratefull to the eyes.. and to me the transparent installer is very practical and gratefull to the eyes

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To me, is how for example emulator frontends. There is HyperSpin (very impressive visually with the correct themes) and MaLa frontend (visually poor than HyperSpin, but 100 times more practical).
P.D Moderators, if i cant speak about emulators, delete this post, i dont want skip rules