What the...

OK. First, nobody "previously thought" that evolution happens at random... Parts of it, yes, sure, like mutations or genetic drift. But selection is not "at random" in any reasonable meaning of the word.

Second, the paper results are basically about how selections shapes the co-occurring of genes within a genome, in the context of e.g. gene transfer. Interesting, yes. Revolutionary, certainly not. Most biologists would have predicted that outcome... Of course, selection is going to constrain the co-occuring of some gene families, why would this be surprising?

Anyway, look into the study, it looks interesting but you can spare reading the article, it does a very bad job (sorry OP) at placing the idea in its scientific context and the authors are not helping with their bragging about "revolutionary" discovery.