I&#x27;d say that in 2008-2009, Flex, for that sort of application, wasn&#x27;t necessarily a bad bet.  Most people date Flash&#x27;s demise to the start of the mainstream smartphone movement, but the first iPhone was only released in mid-2007 - obviously it had no Flash support, but it notably didn&#x27;t have a lot of other things too (like copy and paste!), so it wasn&#x27;t immediately obvious that it would never get Flash; and the Android devices that followed the iPhone <i>did</i> support Flash (it was even touted as a differentiator from iOS devices), albeit poorly.<p>Steve Jobs&#x27; &quot;Thoughts on Flash&quot; piece was published in 2010 and that probably did hammer a few nails in the Flash coffin, at least in terms of public awareness.  I think if you were betting big - millions of pounds big - in mid-2010 on Flash, you could be accused of making a silly mistake.  Before that, I think it&#x27;s more forgivable.<p>Flex was always bunk, if you ask me, but it did some of the same things that people like about Angular, with the addition of a bunch of (fairly poor) UI components.  In theory you could build business-oriented &#x2F; data-driven applications with it quite easily, so finance was very much its intended audience.