Flash was on a bunch of mobile platforms, just not iOS. When it became clear that Apple were going to take a sizeable chunk of the market and were never going to support it, Adobe decided to cut their losses: https://web.archive.org/web/20111116013328/http://blogs.adob...

Well back in the day, if you wanted to provide some interactive experience worth having on the web, you did it Flash.

It fits entirely to be supported on consoles.

I remember trying to browse a Flash build promo website for Transformers 2 on my PSP (what a 2009 sentence) and it wouldn't load. I was quite disappointed.