Cross platform was the big draw card for me with XE2. 64bit was not an issue. the iOS support was aweful and even developing for MacOS was frustrating. We spent months of work building an app that was never usuable enough. We ended up canning it.

We do all our cross platform stuff, games and apps using HTML5. It is fast enough for what we need, easy to access data works on all platforms and can be easily made to function like a native app on Apple and ANdroid tablets and phones. I can't ask for more.