I'm not sure that's really a problem; if anything, it might be a smart move. PHP due to its large installed base, might become the legacy software niche similar

I'm not sure that's really a problem; if anything, it might be a smart move. PHP due to its large installed base, might become the legacy software niche similar to COBOL. While the younger generation might not want to touch it, older developers might have no problem with it - provided such opportunities are still available.