So much this. Plus, we have certified CentOS servers that are only allowed to run 5.4 for the next years to come. Not to mention that the syntax and stdlib are a nightmare.

Thank god, we convinced our bosses to rewrite our legacy systems in elixir, since ~10years of iterative php progress grinded to a halt with lasagna layers of spaghetti code of homegrown-everything. Unmaintainable now, but the feature request keep coming in, and will do for years to come.