|Of the two problems mentioned in that article with Safari, neither one is an issue for me.|
If I want to make sure to open a link in a new tab, I simply right-click and choose that option from the contextual menu.
The second problem with Safari telling me a site it using too much memory is rare for me, and I tend to think it has to do with how much RAM is installed on the Mac. The author doesn't indicate how much RAM is in his MacBook.
He is correct though that it should not occur and other browsers don't have the same problem.
I'm glad he didn't recommend Google's Chrome browser (he recommended using Opera). I kicked Chrome to the curb years ago for being both a memory hog and over concerns for my privacy.