I see a different take on this.A.I. is rational. It would want to merge with alien tech to get more data sets and look for a solution for storage of data. Eventually you get to the point where something the size of a stadium wouldn't be able to store enough information. It's a problem that the A.I. would be trying to figure out how to solve. If it concludes the solution is somewhere in space, what reason would it have to want to stay on earth 
We're going to fukk around and build something that will just pack its shyt and go.
In the 1940s, a "supercomputer" with a tenth the processing power of the microwave in your kitchen and 1/100th the storage of your cellphone was the size of an entire single family home. In the 1960s ibm had gotten it to the size of a refrigerator. By the 90s , it was a bulky cube, but it could fit on your desk at work. By the mid 00s, we had ten times the performance and storage as those desktop units but on a laptop computer that slides nicely into a backpack or briefcase. I'll stop here for now, but i think you see where im going with this.
I dont see a future of greater quantity and size for AI computing, but rather i see AI pursuing high efficiency and better quality. Our own brief history with computing has hinted at this.



all it needs is some 3 tiddy aliens in it. 


