My thinkpad is from 2017, but I bought it in 2022, it's still working fine - I upgraded the memory to 32G (£70) and I've replaced the battery twice (once when I bought it, once a couple of months ago). When I replace it it will likely be because of hardware failure (droppping it etc).
They'll look good, work well (from hardware perspective), and you can replace their built-in Windows OS with the Linux flavor/edition of your choice.
By the way, if ultraportable is your idea of laptop nirvana, you can try... Samsung made awesome AI-powered laptops (the Samsung Galaxy Book5 and Book6), I got the Book5 few months back for my friend's son. It is sleek, lightweight and powerful.
Here is the TG review/verdict: https://www.tomsguide.com/computing/laptops/samsung-galaxy-b...
Don't get any gaming laptop. Some of them are truly bottom of the barrel slop and it really matters that you do your research. (See, for instance, NuclearNotebook reviews on YouTube)
But for decades, I have found that gaming laptops (decent brands and popular models) gave best bang for buck, especially with AMD hardware. My 12+ years old Lenovo gaming laptop is still going strong, and my 15+ years old Sony Viao netbook is also doing well (with SATA SSD and RAM upgrades few years ago).
But yeah, read/check up on the reviews (from reputed reviewers) before splurging for an expensive laptop.
One nifty trick to identify VFM(value for money) laptops is to check Amazon site/app for "Smartchoice" laptops. It is a special keyword that Amazon adds to listings of popular laptops that are VFM (best deals) and having good reviews.