Shares of Dollar Tree (DLTR -0.74%) are up more than 60% since mid-March and are fast approaching a 52-week high. As the company prepares to divest itself from its Family Dollar brand and embraces a new pricing model, Dollar Tree appears capable of thriving even as many retailers struggle with tariffs and economic uncertainty.There's a lot happening with Dollar Tree -- management changes, the Family Dollar mess, and its 3.0 pricing model. But all of it makes Dollar Tree a compelling stock that appears capab ...