Somewhat off topic rant about grammar

Such that or so that?

Is it just me, and it is acceptable these days to write like this: “interest rates rise sufficiently such that the dollar safety margin is negative in a contingent immunization strategy…”? Schweser does this all the time, but I think not CFAI.

I thought that “such that” should have a subject noun or pronoun that refers to the object such that… The more appropriate “so that” refers to the manner or purpose of action. Or is it now normal to have a subjectless “such that”?