To the extent users do care about the tech, they care about performance not how "clean" the code is or whether you're using the newest framework. Users hate when software is slow or uses an exorbitant amount of memory.
The sad fact is this encapsulates features (ease of development, a framework probably does help you ship faster), adaptability (clean abstractions that are easy to work with), and performance.
Finding that balance is always going to be hard but they’re all important!