I taught GMAT prep which included a Sentence Correction component that followed the SWE conventions strictly (SWE stands for Standard Written English) and 'like' was used to compare nouns, while 'as' was used to compare clauses, very clearcut and without interchangeability. Nouns are still nouns and clauses are still clauses, no matter how many times we use all lowercase text in SMS messages or posts and how many technological coinages have entered our language.