I am a former frustrated 13 owner that made the leap of faith on the 14 and I am quite happy with mine. While Purism did not offer/could not offer to cover the issue due to warranty - I did continue to visit the forum and watched Purism speak to how they evaluated the issue, identified the root cause, and how the issue was addressed in the L14.
If you can find similar satisfaction, I think you will be rewarded. I love my laptop and am happy with it.
PS - I loaded up my L14 with 64GB of RAM and find its performance quite satisfactory running Qubes OS 4.1.