The cartridge could be a small mac-mini type unit connected and powered over thunderbolt. If it included like an m5 or m7 with 64GB of memory and a PCIe5/6 4TB Nvme it would be amazeballs. Hopefully when the bubble corrects and hardware advances and prices reset something like that will become available.
Just even comparing compute from 10 years ago (Apple silicon vs Intel) and it's significant. 20 years it gets crazy. My first computer was an 8 bit 6502 with 64K RAM and a 128K floppy drive (I think, it's fuzzy). Everything amazing now will look quaint in due time.
It is not linear anymore, take in consideration the Moore's law, the curve is nearly saturated now and gains in performance and memroy are not accelerating any more, BUT there is some hope with new different technologies, like the PHOTONIC chips , doing GEMMs through light particles instead of electrons