Back in 1995 I had Psion 5. It run EPOC operating system, which later turned to be Nokia flagship Symbian.
In 2007 when I took this picture I thought that why Nokia acquired EPOC for smart phone platform and made it ten years too late for try out to public consumption. Ever since I have just wondered why Nokia is not capable to do right decision, they kept back Maemo team's with N800/N810 which was superior product on those days. They were too tied to operators and that obsolete EPOC variant in their main products and were afraid to fly with Maemo.
But still, there is one major factor which is affecting to iOs and Android dominance and volume. It's well kept secret and who know how long it will stay like that.