I think answer to your question lies in your question itself.

Please allow me to explain 

first why there is different version of the LINUX?

Because code is freely available to use, edit and redistribute, whereas everything is propitery in IOS and windows OS. This open source in Linus gives you ability to create whatever you want out of it.

You can take Linux kernel and add few opensource utilities to it and create a version. you can tweak the kernel and few open source utilities and you can install it in smart phone.

Whatever you do, OS will still be Linux why ? because the kernel is the same in all, you used it because it is available for free.

So heart of the OS  in  all Linux is same, its freely available Kernel. ppl just add different utilities.That is why they always add the name "Linux"

But I have not seen one particular version of the Linux saying, I am the last version and there will be no more new version.And those who produce new version have never said that we are the last ppl who know the inside out of the Linux, from now on there will be no one working on Linux.

They have not put and end to the new version neither they have right to do so.

Now,

Islam and other comparatively new religions used open source available in Rigved, Akkadians civilization, Sumerian civilization and  Mesopotamian civilization. And may be these civilization used the oral continuity which was preserved way before them. because at that time writing system were not developed so everything was oral. 

Once the writing system was developed, Akkadians, Sumerians, Mesopotamian and Hindus recorded their code.

Later religions used this freely available kernel or religion, added their own history  and some new utilities which society already deemed necessary (utilities software) and started to distribute as their brand.

may be it was ok at that time and period because there was no concept of copy wright. But these new religions took others product, added some utilities and copy weighted it. This is the problem,

And present day ppl are fighting saying mines is good yours is bad and killing many ppl for a duplicate product which is packed in different packing materials. 

If you bottle old wine in a new bottle it cant be a new wine.

And it is very strange that many Muslim, I don't know why always love to give some example from software hardware.

few months back one gentlemen in Kurakani was asking, which generation of computer you want to use? Islam is the latest generation.

First of all lets us compare the software, If Islam is like Ubuntu Linux, saying there will be no more new version is wrong. and if someone says so, I know you wont believe it. There will always a new version and the extent of addition will be determined by the necessity of the user. 

Taking open source material, adding some utilities and , branding as new and  propitering. Putting and end to yje development of new version and and claiming "I am the last one" is wrong. And, at the main time excluding the other version which are already available is also wrong.

Now let us talk about hardware version, new generation of computer

What will you do if some computer manufacturer come and say, this is the latest generation of the computer you have to accept it, because we say so. Other computers wont give you desired work, they are not effective. In future no company will manufacture new generation of computer because our scientist say so. This is the last CPU, this is the last OS, will you believe it

Wont you laugh at such statements?

My dear friend, new religions making such claims and ppl who know, know that this can not be true. How ppl who know, will react to such statements  they will just laugh at the naivete of such ppl.