You had not hear about MUI until 2000? Were you hidding behind a rock? And what programs did you use in 2000 to connect to internet? Almost all Amiga internet software uses and used MUI. Didn't you use Miami, YAM, IBrowse, AmIRC, Amster (napster)...?
Nope, never used any of this stuff until the early to mid 2000's on an Amiga. I took a long reprieve doing anything "serious" on the Amiga starting in the early 90's when I was seduced by the 386's, 486's and eventually the 586's & AMDK6 of the time - so I totally missed out on all these new libs, plug-ins, etc.
I guess you would also complain when a program required bgui, gtlayout, classact or any 3rd party library.
At one time, of course! lol First time you have to go searching all over creation in order to get someone else's program to work, it's definitely an exercise! But that's become expected in the world of Amiga.
MUI is not a "program", it's a set of libraries and classes that allow Amiga coders to produce decent GUIs, something very difficult with crappy gadtools or other primitive graphic toolkits.
Have you ever tried out MUI examples? You have all kind of different classes, you have drag'n'drop everywhere and it's a pleasure from a programmer user point. You can set per-application preferences depending on the preferences you want
IIRC MUI3.8 is even included with AmigaOS3.9 as contribution.
BTW, MUI is not slow, try to build similar complex interfaces with Reaction and you will notice it. People who claim MUI is slow usually fill every gui element with textures and later complain about slowness.
Thanks for the explanations. I guess I get some of what MUI is supposed to be about (standardization and simplicity for programmers/end users), but am still "sticker shocked" when I see all the options available for some of these programs. I bet it's great from a programmers or developers point of view, but for an end user that was used to how most OS1.3-3.1 programs handled themselves, MUI at times seems to be "too much", too feature ridden almost.
And the slowness thing, no... always just use the plain and simple grey backgrounds. No fancy graphics and textures.