It depends on the formula, designs and maintainers of them - we run an internal tap and some items are casks, some are bottles and some are compile as you go. It just depends on what that widget is and does, and in some cases there are tools which are broken on latest-tagged releases and people have to pin older versions or using git HEAD for (some period of time) until the tagged released is fixed upstream. (we're looking at you, sshuttle-who-deprecated-remote-python2-in-v1.0-thru-1.0.4-and-broke-lots-of-workflows-with-jumphosts)