Most, if not all developers from the era have moved on or retired. That's the problem, they hire coders not system analyst/architects to reengineer legacy applications. who ever they do hire didn't move up the ranks, lack required experience. I've seen major financial institutions hire senior IT executives and architects with no systems integration experience. Obviously they got into trouble. And they wonder why. It's like the blind leading the blind. Then they outsource to an offshore company. We all know the outcome. Old legacy apps patch on top of patch. With a weird looking UI held together by middleware. That no one wants to tackle.
Your thesis is that the market will be automated by retail traders. You provided no evidence of this except something about systems engineers. Given human nature, the only ones who will do this automation are those who genuinely enjoy it.
Just when I get it,buy all the equipment and am just sitting back to press the button to start collecting,something will happen to stop it.