It is far more likely that this is from the rise of “sexier” server-side coding languages like Rust. Now I don’t know much about Rust (although I will look into it more) but I a bit of Googling on Rust vs PHP a while back and PHP is still a solid choice for a lot of things and there seem to be a lot more people out there who can code in it, making it a.good choice for FOSS projects.