I currently work for an investment bank in London on a trading platform written in Adobe Flex. Resourcing and recruiting isn't actually much of an issue as whil

I currently work for an investment bank in London on a trading platform written in Adobe Flex. Resourcing and recruiting isn't actually much of an issue as while the pool of developers is small they are also highly skilled and specific to the target platform and business. We have JavaScript migration plans, but for something with so many developers and hundreds of thousands of lines of code the tools are only really reaching the required maturity. In terms of "because you know standards, multi-device compatibility, etc. are important!" this is actually not very important, we have native mobile applications and there is zero chance you would run a desktop app on a mobile device without the majority of the code being different. The main driver is security concerns with the Flash player.