I read it as a more general cautionary tale rather than an attack on this particular feature or language. Be aware of new features, because even ones you don't

I read it as a more general cautionary tale rather than an attack on this particular feature or language. Be aware of new features, because even ones you don't know about and don't use can cause you problems. Or alternatively for language developers, be aware that new features can make the language harder to use even for people who don't use them.