I owned a Z13 Gen 1 and it was a horrendous piece of crap. I constantly had crashes, hangs, faulty suspend, keyboard problems, dock problems, audio problems, and so much more from the very beginning.
I very reluctantly purchased a X1 Carbon Gen 12 and am much more satisfied with the Linux implementation.
My Z13 most definitely was defective, although after seeing a few similar cases, I wonder if they had a bad batch or if that was just an unstable platform. Even after getting it serviced (which was a joke, because they don't diagnose Linux machines at the service center even though Lenovo sells them) nothing improved.
Strangely fortunate: it got stolen in Dublin and was covered by insurance.
I very reluctantly purchased a X1 Carbon Gen 12 and am much more satisfied with the Linux implementation.