You're talking about post-D50 Roland. Before the D50 Roland made simple analog synths with very intuitive interfaces. After the D50 - and especially after the

You're talking about post-D50 Roland. Before the D50 Roland made simple analog synths with very intuitive interfaces. After the D50 - and especially after the DX7, which started the one-slider-panel 80s trend - synth interfaces started to sprout two-line LCD panels. Most Roland UIs today are pretty horrific.