Do you think compiler support is instantaneous for all platforms on all operating systems, retroactively, when the standard is published?
And all major compiler vendors have since learned that they need to be up to date with the standard ASAP, even before official publication when it is possible.
Advocating C++ < 11 is harmful to the community, given how bad it was at that time.
Suggesting that older versions of the compilers (which may be the latest available versions on certain systems) also do so is the "retroactive".
So no, they are not the same. But yes, they are both reasons why one can not just blindly start using the latest features from the latest standards.
Fixed that for you.
For all it's problems (some of which are being addressed in recent standard update , some not so much yet) it remains the best available tool for some domains. More's the pity.
I started with C++ a long time ago, but for whatever reason, kept getting out of it (for a few years) and then every time I'd get back in, I'd be surprised at the new stuff.
https://en.wikipedia.org/wiki/C%2B%2B11#Right_angle_bracket