Raspberry Pi Bootloader Possible?

I always like to start a post like this, just in case I am wrong on early assumptions that the entire chain of thought I came up with would then be false so here it goes…

My Understanding of how a Raspberry Pi boots susgests that a bootloader would in theory be possible. Would anyone more knowledable be able to confirm this?

As Far as the boot loader is concerned, there are many many reasons to develop one in my mind. All you have to do is be a bit creative and your come across lots of reasons yourself.

Like to hear everyones idea on a bootloader for Pi2/3’s so please ask questions or make comments