What I respect about Apples Swift (not to be mistaken for the other PL Swift) is that it/Apple doesn't claim Swift to be anything other than it actually is. An improvement on PLs already exisiting in Apples Ecosystem tailored *specifically* for developing in that ecosystem, catering to the preferences and addressing the pet peeves of their developer community. AFAICT with no downsides and measurable upsides if you intend to develop native iOS Apps exclusively.
*This* all IMHO is a new lock-in PL done right - as far as you can do those right.
contrary to all the lies, damn lies and hideous marketing bullshit that went into the
Apple did it right again in the way that they actually let the engineers take care of the language, the designers layout a nice free iBook on it and basically kept marketing out of it.
If I ever do native iOS development and embrace the golden cage, I might even look into it - the syntax does look less scary than that of the classic C family.
My 2 cents.