You seem to have a very simplistic understanding of psychopharmacology but I will assume you are not a psychiatrists. Firstly, bupropion definitely can and does cause hypertensive crisis (I've seen this happen) it just doesn't have the same "EAT SMELLY CHEESE AND YOU'LL DIE!!!" rap that MAOIs have. Secondly, it is largely because we have more benign drugs like SSRIs and bupropion that MAOIs have largely fallen into disuse. So I would say that using these newer drugs (SRIs, SNRIs, mirtazapine, bupropion) alone or in combination with each other, has become first, second, and third line in the treatment of depression, including atypical depression. Third, MAOIs come into play when the newer drugs (and TCAs etc) aren't effective. Fourth, MAOIs are effective in the treatment of neurotic/anxiety states (which is essentially what "atypical depression" is) whereas no one is going to be using bupropion for the treatment of obsessionality, panic, hypochondriasis, social anxiety disorder and so on. Fifth, it is debatable how much of the efficacy of MAOIs have to do with "stimulation of all three neurotransmitters" [sic]* it is primarily the inhibition of degradation of 5-HT by MAO-A that we're interested in, but who knows.
So yes, the combination of an SRI/SNRI and buproprion is much beloved by psychiatrists, but it certainly has not obviated the need for MAOIs in limited cases, and would not be expected to be effective for the kinds of neurotic states MAOIs are helpful with. Bear in mind, it is highly unusual in this day and age for pts to be on MAOI monotherapy. Since they will have failed multiple agents, we'll either augment with Lithium, or T3, or combine with a psychostimulant and benzodiazepine. The braver might combine an MAOI and TCA!
*there are many more neurotransmitters than these three, and many more neurotransmitters involved in modulating emotion etc than these three