Also, I wonder if the low density of RISC could be countered by introducing execution of compressed/zipped machine code. Some compressors like brotli are highly tuned to the expected type of data to be compressed and are very compact. All entry points to basic blocks in the code are generally known at compile time, so it can be ensured that the jump destinations are decompressible without any context, avoiding the slow process of needing to scan backwards to start decompressing...