TempleOS is somewhat of a legend in the operating system community. Its sole author, Terry A. Davis, has spent the past 12 years attempting to create a new operating from scratch. Terry explains that God has instructed him to construct a temple, a 640×480 covenant of perfection. Unfortunately Terry also suffers from schizophrenia, and has a tendency to appear on various programming forums with a burst of strange, paranoid, and often racist comments. He is frequently banned from most forums.

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This has made my morning

But yes... I do tend to agree with the sentiment leaning towards biting off more than one can chew on a secondary glance at where things are at. Not intending to discourage development in any way, but well... One has to ask whether it will be a particularly worthwhile cause by the time it comes to workable fruition. I certainly do not have any intentions of ditching my PPC machines anytime soon, but I am sure that the numbers will dwindle slowly over the next 10 years... If for no other reason that hardware failures. Realistically, The G5 is the PPC that is worth coding stuff around, however I can iimagine the only G5-based machines left in the world in 10 years time will be Quad and dual-core PowerMacs... I'd say almost all of the earlier Powermac G5's and the iMacs would have found there way into rubbish bins because they were loads of crap from day dot. This makes it a better prospect to code stuff largely around 32-bit processors, meaning the capabilities of the remaining G5 machines will be not entirely made use of to the fullest potential, but well...How many developers will be enthusiastic enough even in 5 years time to keep coding new software from scratch, or going through hoops to rework existing code to port to a brand new operating system for a processor architecture that was considered expired 10 years ago by the majority of the world?

And all this is assuming that somehow development could leap into overdrive and get somewhere in that time which, well... let's be realistic, seems unlikely even at the hand of a handful of committed and semi-competent developers without corporate backing or financial drive. That's another thing also... who is paying for it all? It's all well and good to spend forever building an OS, but realistically in human terms, time is money. There is only so much time one can dedicate to something that doesnt keep lights on and mouths fed, and it's unrealistic to expect any major financial input from... well... anywhere. Much as the idea of a new OS for PPC seems cool, i doubt anybody would want it enough to pay for it when funvtional, pretty, quick and stable options already exist for free and have massive support. Fair enough, people still actively develop Linux, but well... there is a lot of cross-compatibility in the nix ecosystem, and Linux in all it's flavours has been developed collaboratively by hundreds, thousands even of developers worldwide for over 20 years. The hard work was done a very long time ago, and the idea has always been in a lot of cases to keep it simple and uniform rather than do things wildly differently... When you do things out of left field it best be something monumentally better than what curently exists, or you are likely to end up with a big white elephant.