A non-issue that does not address what I wrote.
Tiny RAM is not a problem since the processor instructions are stored in and run from larger flash, unlike a PC with instruction pointer addressing RAM.
ATtiny85 can connect to SD and use a buffer as small as 34 bytes (to use burst mode). Adding SD allows virtual memory, the Tiny85 gains big capabilities. 8K flash is room for a nice interpreter that could run source stored on SD, open-ended capability.