But now you have to maintain it.
No, I mean competently.
Once upon a time I maintained servers. PHP updates due to the combination of "upgrades" and exploits make me VERY happy to no longer be administrating machines. Seriously... it was like it PHP was attempting to be the third banjo in the dueling banjos of fail known as Java and Flash. Bringing something like the bane Java and Flash are into a server context, as opposed to client, is something I would rather avoid. Sure, "It's totally mature now!", just like it was when I was a server admin.