Well the one I'm familiar with is Apple's explicit disabling of thread-local storage for a long time. See e.g. https://stackoverflow.com/a/23850891 https://stac

Well the one I'm familiar with is Apple's explicit disabling of thread-local storage for a long time. See e.g. https://stackoverflow.com/a/23850891 https://stackoverflow.com/a/23850891, which thankfully has been fixed since then (but it took something like 2 years).