While the "ipc-7351c pdf" is the current gold standard, the industry is already developing the next iteration—expected to be (though future names may change). Trends include:
When a board fails quality inspection, the first question is often: "Does this meet IPC standards?" If your footprints are compliant with IPC-7351C, you have a defensible standard of quality. If you "guesstimated" your pad sizes, you are liable for the defect. ipc-7351c pdf