We can make charts galore about the tech IPO market. Yet none of them diminish the profound sense that we are in uncharted territory.Never before have so many companies with such high revenues gone public at such lofty valuations, all while sustaining such massive losses. If you’re a “growth matters most” investor, these are exciting times in IPO-land. If you’re the old-fashioned value type who prefers profits, it may be best to sit out this cycle.