5 takeaways from analyzing profitable (and not so profitable) brands — Over the past decade, a raft of well-designed brands like Warby Parker upended large brand houses by going direct-to-consumer. Or did they? Luxxotica, the slow incumbent eyewear manufacturer supposedly disrupted by Warby Parker, has watched its stock steadily appreciate since Warby’s founding in 2010. Warby Parker, on the other hand…