Speaking about [upcoming] 64 bit Delphi compiler, I did forecast they will surely release their compiler 5 years later than FPC's... hoping they will follow the FPC way, just as Intel did about 64 bits instructions, against AMD.
What I was referring to is that AMD was the first to publish a 64 bit x86
CPU, with a new instruction set. Intel released somewhat later their own 64 bit
x86 CPU, following the same instruction set.
There are some variants between AMD and Intel CPU, some dedicated instructions
or implementations.
But most instruction set is perfectly compatible.
And I suspect the more it gets, the less compatible FPC and Delphi will be.
The main difference between Delphi and FPC is that the first is a business company project (Embarcadero), the second an Open Source solution. They are not two billions dollars companies fighting each other, with some state-level institutions watching about any unfair competition or monopoly... FPC compiler is technically a great and robust project, but EMB follows business rules. I don't think anyone will play "Anti-monopoly" in favor of FPC.