However, many projects are starting to get some adoption, that bring this long-lived approach to the PHP world. The problem with this is that PHP developers are not used to this, and they tend to continue acting as they have always done.
This can lead to inconsistencies which are hard to debug, so you need to have it in mind.
The problem with this is that you need to implement the mechanism to invoke that when a file is changed, or use some library that does it for you. Also, I have noticed that even calling that and seeing that the server is reloaded, does not always have the expected effect, and you have to still end up doing a hard reload.