Agreed!Between 3 and 4, Sound Studio 3 (3.5.7) had the better UI, more shortcut keys, and was more in spirit and keeping with its OS 9 antecedent (a fresh Carbon build without resembling a quick carryover from OS 9 via, say, Classic code base).
On all the Macs on which I have both 3.5.7 and an iteration of 4 (usually above 4.8), I find myself using 3.5.7 for everything except when saving into certain formats (on which 4 and up handle better than 3.5.7 does).
I only recently tried version 4 and I also prefer the look of 3.
Too bad there isn’t an option to go back to the prior UI.