I think this entire disagreement is about language, and in particular the implications of the term "boring".
The term we are looking for here is something that means:
"A piece of technology that has been around for long enough that all of the sharp edges have either been filed off or are well documented and understood. We would not be the first people to solve our particular problem using this stack - in fact we would be using it in a predictable way that many before us have already shown to work. It's widespread enough that many people already know it, both on our existing team and in the pool of people we might want to hire from. We won't get to show off about this - our usage of this technology will not become the thing of legends, or conference talks, or blog posts. Our problems require unique solutions in other areas, but for the bit that accepts incoming web requests and runs some queries against a database we can go with something that's low risk, well established and very unlikely to surprise us."
I think boring is a fantastic shortcut for that, especially if you can trust your collaborators to understand it to mean that.
If you can't trust your collaborators to understand that then sure, you need to find a different word.
A couple of decades ago I helped create Django. One of the achievements I'm most proud of is that Django has graduated over time to being one of the most clear examples of a "boring" technology - it's widely used, stable, reliable, and thoroughly understood.