>Memory consumption is bloated and the CPU caches thrash. Launching a subprocess is expensive

Statically and dynamically loaded binaries are resident in the kernel's page cache. Which while each process will have different locations within its process address space for each process (b/c ALSR), they _should_ be de-duplicated in RAM, ultimately all these seperate in process images will be pointing at the same physical RAM page(s).

So from a hardware cache standpoint you're mostly okay.