I hope you are correct and look forward to what you describe. However, even with the open source move, we see the internet still siloed. And while LLMs are on other machines, arent they still feeding the same source?
Data might not be secure as you mention. However, they can make it difficult to get a hold of. We already saw steps taken to limit scraping of some sites. Will that continue?
It is going to be a race for a while. We will see how things unfold over the next 24-36 months.
I must not be understanding your question, because the open source devs running LLM's on laptops are not the corporations running LLM's on supercomputers.
As to BLM escaping into the wild and the access to data preventing the utility of BLMs to open source devs, the example cited illustrates the ubiquity of the availability of the data to devs. It isn't overlords that control making coffee. The data necessary to train AI to tackle tasks necessary to civil society doesn't have any way to be sequestered from the people that generate that data. All the tasks desirable to automate are the laborious work ordinary people do, necessary to keep the wheels on the bus of civilization.
Nothing overlords do is desirable or necessary to automate. Freedom is the cessation of overlords. That used to be inconceivable because industry required pools of capital and coordination of collective labor, which required hierarchical control, and overlords. Automation renders collective labor obsolete, which renders hierarchical control obsolete. Decentralization of the means of production, transforming production tooling into table top tech, renders the pools of capital formerly required to produce goods obsolete, which renders overlords obsolete. That transition to the Space Age is the obsolescence of overlords.
The data overlords depend on for their control of humanity aren't generated by them, but by us. The cameras surveilling us on satellites, spyplanes, telephone poles, and etc., are much more expensive and difficult to site and maintain than the cameras I own, or the cameras the landowner has surveilling the neighborhood. We are the data. Coordinating sharing that data amongst ourselves is vastly less expensive, difficult, or objectionable to us than overlords acquiring that data over our objections.
Centralization cannot compete with decentralization economically. The primary impediment to eliminating overlords is psychological. This is the reason for the massive implementation of indoctrination, censorship, and propaganda, because that is the actual mechanism that overlords depend on for their wealth and power - psychologically preventing us from just doing ourselves what is necessary without being told what to do by overlords. That is so artificial and tenuous that it is really impossible to project forward to a world in which overlords maintain their wealth and power. Natural evolution of every social, industrial, and economic mechanism eliminates unnecessary complexity, and that eliminates obligate parasitic extraction of the wealth and power that neither depends on overlords nor inures to them without frivolous externalities. We neither need them nor benefit from them. They are not only extraneous to production, but detrimental to it.