For Elias, a freelance developer in 2012, his most prized possession wasn't his laptop—it was a battered 16GB Kingston flash drive. On it sat a "Portable" version of Visual Studio 2010 Ultimate he’d found on an obscure forum.
Unlike modern text editors (think Notepad++ or Sublime Text), Visual Studio is a massive, system-dependent ecosystem. When you install VS 2010, it does much more than copy files to a folder: portable visual studio 2010 ultimate