Everyone of those workloads is a STUPID match for an 8GB system as every person on this thread would tell you!
If you are doing serious work in Lightroom or FCP or whatever, OF COURSE you don't use 8GB; that's common sense.
The whole point of people defending 8GB is that there are PLENTY of users who don't, in fact, use Lightroom or FCP. You don't prove anything by telling us what we already know, that large content creation apps are a poor match to 8GB.
BUT the fact that so many people are excited by this article, and the fact that this is apparently the best argument they can provide for why 8GB sucks (as opposed to, you know, actually engaging with the real arguments) tell you everything you need to know about these people – how little they care about reality, how little they care about logic...