[...]
I suppose it depends on where you live, but in an area where power supply is stable, I think keeping everything in memory and writing it in one go would be best. [...]
Yes. I used
/dev/shm and a symlink, until the blockchain download finished.
(Sounds like wx was broken. I haven't messed with it yet, sorry. Does it have a helloworld you can build?)
Yes, I stated in my post that I could build and run the demos included with wx.