i'm an outlier then, i've been "shopping" on the porsche configurator for years ;P
i remember an amazon config website that looks close to this but had an actual options list like one you'd see from honda. either limiting configurations via grouping options, or packaging them in trim levels, etc. could reduce the complexity, too. but to your audi experience, it's easier to get away with fewer options lower in the market. with a feista fewer options are ok, but with an a8 not as much.