In the limit, there are also many ways to debug and patch issues in closed-source projects (someting I've done once or twice myself), unless they're run through

In the limit, there are also many ways to debug and patch issues in closed-source projects (someting I've done once or twice myself), unless they're run through an obfuscator or something. But there's always a dividing line where "reimplementing the functionality you need yourself" is far easier than "trudging through an old codebase that's tough to even get building".