It's certain that there will be fragmentation. There isn't any gnu project, which hasn't added its own extensions to standards or specs. Few examples: gcc front

It's certain that there will be fragmentation. There isn't any gnu project, which hasn't added its own extensions to standards or specs. Few examples: gcc front end for C/C++, bash, grep.. It means that crates.io will have crates which compile only with gcc and its extensions.