I started a new Perl project 7 years ago and it has been an ecstatic experience for me. It is basically a text processor and HTML generator, so Perl has all the features I need. I am so happy, and I'm not even using anything beyond 5.010. I'm at 32K+ LOC now, and I'm also using the project to teach programming to Ukrainian kids over Zoom.

Number of breaking changes I have experienced in these 7 years? 0.

Number of times I've had any significant issues setting up a new deployment? 0.

It may not be as popular, but it certainly continues to work well.