I currently work for an investment bank in London on a trading platform written in Adobe Flex. Resourcing and recruiting isn&#x27;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.<p>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.<p>In terms of &quot;because you know standards, multi-device compatibility, etc. are important!&quot; 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.<p>The main driver is security concerns with the Flash player.