The United States Patent and Trademark Office has published a patent application made by Apple Inc. titled "ingress prevention for keyboards." The wordy document features a number of technical drawings showing alternative examples of key assembly. The general idea of the patent is to "block contaminant ingress," so could this mean future MacBooks will have crumb-resistant spill-proof keyboards?
https://www.notebookcheck.net/Future-MacBooks-could-have-crumb-resistant-keyboards.288876.0.html
Very interesting, thanks a lot!