I feel like it would be a /tremendous/ amount of work to install packages -- which often have dependencies -- asynchronously.
When is this really a problem, anyway? You should probably not have something like 'brew update' scheduled to run periodically, as then a broken package could break something unexpectedly. It should really only be run when you're ready to check for broken things, which means you can also schedule it to run when you can deal with waiting for the process to complete.
When is this really a problem, anyway? You should probably not have something like 'brew update' scheduled to run periodically, as then a broken package could break something unexpectedly. It should really only be run when you're ready to check for broken things, which means you can also schedule it to run when you can deal with waiting for the process to complete.