Was it a Gen 1 device? I bought a Thinkpad X13 Gen 1 many years ago and it kept having blue screens from RAM errors and other problems. Eventually after many warranty attempts and motherboard replacements they sent me a new X13 Gen 4. This has been running Ubuntu with no problems for 4 years now, it might be more a "lemons" phenomenon than a general rule. Also, AFAIK, the case is metal with a "soft-touch" coating.

The Apple ARM processors are still in a league of their own but personally I'm not willing to give up my OS freedom of choice for that advantage.

Not my experience in the slightest, after two decades of personal thinkpads and around 20 issued to my team.

Also if you'd just spent that extra 120 bucks for the 3 year onsite warranty, you'd have a lenovo technician replacing your motherboard at a location of your choice the next working day.

Since when do we use crowdsourced anecdotes to represent product quality?

I have an X1 Carbon 2023. It's pretty solid, the only complaint I have is once the CPU usage is over 10% the fan starts running full blast.

I also bought a ThinkPad X1 back in 2015. Used it for 9 years with no issues at all. I installed Linux on it last year and still use it.