> And you need to use the C++ version that ships with that distro, so if you want to support old versions then the entire project is held back from using latest C++.

> And distos aren't backwards compatible. ie when libcurl4 is released, they remove libcurl3. So you can't have one binary for Ubuntu 18.04 and 16.04.

Release the source and the community will help you with many of these issues.