What you are asking for either needs the software to be adapted to the core components you want to be able to change or if e.g. by DAC you really mean a self-contained device, then it's really just one big box around devices you can already buy.Don't understand your point. It's the same software like all their products. Just slightly different hardware and software modifications.
There are no universally replaceable components like a power supply module, a DAC module, a preamp, module or an amplifier module that would all work together, no matter what combinations you pick. And I don't see any manufacturer attempting such a system.
