Something worth considering: Sometimes people may use older versions of compilers, e.g., older versions of GCC, for compiling older programs for older hardware. These GCC versions are smaller in size and written to run on less powerful hardware. For example, the gzip'd source tarball for GCC 2.95 from 2001 is 12M while the one for GCC 12.2 from 2022 is 143M, an 11x size increase.