> well architected, well written codebases Not a lot of that, tbqh. Check the PostgreSQL codebase. One of the cleanest big codebases around. Here's a list of

> well architected, well written codebases Not a lot of that, tbqh. Check the PostgreSQL codebase. One of the cleanest big codebases around. Here's a list of resources for devs: https://wiki.postgresql.org/wiki/Developer_FAQ#What_information_is_available_to_learn_PostgreSQL_internals.3F https://wiki.postgresql.org/wiki/Developer_FAQ#What_informat... Also, what are your goals? Understanding ugly written, barely working, and badly designed codebases is a much more useful skill.