Should i stick with c++11? [on hold]

I have been sticking with C++ 11 standard for a long time (when learning c++), due to the fear of new standards may not be well supported on some platforms.

When I was exploring on the Internet, trying to find some more handy libraries, most of those promising ones (at least in my opinion they are) were ignored cause they didn't support cross platform or on some platforms the support was not completed.

But I keep noticing that more and more libraries, applications are refactoring their codebases to use newer standards.

I wonder, as in 2019, is my consideration still worth being concerned?

Personal platforms favored and wanted to work on: Android, iOS, Windows, macOS, Linux(both user end and server side).

I ask this "silly" question because I never manage to find a loosely licenced sqlite like library that are cross platform and require only or less than C++11.