Having had a switchable tune on my S3, I don't consider it a valuable feature. Only ever used it once and the std setting was shocking to drive.
The lack of 98 isn't that big a deal, all cars would run on lower octane fuel at reduced power for a short time. Until some 98 could be found. I have done plenty of road trips between Brisbane/Sydney/Adelaide/Melbourne and only once had to buy 95, because I tried to go one town further to maximise daylight.
My 2 cents
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