Obviously a 100/10 or 25/5 connection isn't going to cut it. I think really the gist of the article is "You need enough bandwidth in both directions". That's it. If you have a 100mbit, 200mbit or 500mbit or 1000mbit down with a 100+ mbit up, that's less important. "Symmetry" doesn't matter, it's enough bandwidth in both directions that matters.
The fact that "enough in both directions" and "symmetric" have been conflated is that because for a part of history, only symmetric connections did have enough upload bandwidth. With the gigabit and multi-gigabit down bandwidths, there is less need for symmetry so long as you have a fast upload.
I fully agree with the EFF that you need a decent upload, to support the applications of today and next few years. But to go fully symmetric actually means to lower the download in favour of upload, allocating exactly half of the spectrum to each.
So absolutely, once you reach a certain threshold I think most users are going to opt to carve up the spectrum in a way that favours download, just based on typical needs.