The workloads you describe don't involve very much disk writing. The workload of a BTC wallet involves a lot of disk writing.
I used a rPi for a project that involved a ton of writing and it died every few days.
Re:Key Lime Pi
by bsilvereagle on Saturday August 02, 2014 @11:01AM
(#8125011)
> I have deployed 3 RPis as digital signage systems. They work flawlessly for over a year now.
I've got about 15 out for 8 months running OpenELEC. No problems so far.
I have deployed 3 RPis as digital signage systems. They work flawlessly for over a year now. I use another one as a home server for DNSmasq/VPN/etc. No issue and has more than 30 days uptime.
I share your views on SDCards but I don't consider the RPi 'unstable' by any means, although the SD cards get easily corrupted.
I had a 'bifferboard' (extremely small board) and an eBox2230. I know what unstable looks like, and the RPi is the most stable mini-PC at that I've seen so far.