There’s a general discussion of artificiality on the thread Evolution of modern mixology toward increasingly processed ingredients but I wanted to get specific in this thread.
In social media, I have seen Super Juice tarred broadly as degenerate, and I think it certainly can be degenerate if it isn’t made and handled properly. But I get the impression that some people are saying “Super Juice” when what they’re talking about is merely an acid solution, and that may be happening because some nitwits are trying to use pure acid solutions as a substitute for fresh citrus juice in drinks that call for fresh citrus juice. 
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you can intentionally make an engineered acid ingredient alternative to citrus juice that is purely acids and water, and there are particular applications for this sort of un-fruity specialty ingredient (see Liquid Intelligence; see also, acid phosphate, Lactart, etc.) To reiterate, this is an alternative acid, NOT a substitute for citrus juice.
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you can make a lousy, incorrect, incompetent “Super Juice” that fails as a drop-in substitute for fresh citrus juice and results in terrible drinks; if you do, you have overreached and deserve to be scorned/fired/beaten/all of the above.
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you can make a good Super Juice that succeeds as a direct substitute for fresh citrus juice (i.e., cannot be distinguished from fresh squeezed) and results in great drinks
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you can just stick with fresh squeezed citrus
Please avoid #2. If your Super Juice sucks, you messed up, throw it out.