Performance in an absolute number vs scaling.<p>The lowest hanging fruit gets picked.  &quot;Lets dump absolutely everything and NIH the whole thing for a single time 5% performance increase&quot; doesn&#x27;t sell well when that one time gain is expressed in the amount of time it takes hardware or network capacity to improve 5%, or fixing poorly scaling algos.  Also insert the usual analogy of the ratio of the cost of microscopically faster hardware vs the labor cost of extremely expensive rockstar ninja programmers.<p>Also its assumed that change will lead to improvement because anecdote, or because change is always good.  However, &quot;the thing that won uses text, so naturally we gotta get rid of text&quot; doesn&#x27;t sound like a wise plan.