People talking about old Lenovos being good quality are often talking about in the pre-IBM days which is far more likely to be nostalgia at this point.
By contrast, I know someone who got a T480 second hand and it lasted six months. My guess is the 2012 era was when the change happened
Among a few: The keyboard switch from the old 7-row (whose pinnacle was at the x220/T420 era with double-height esc and del) to the new 6-row (with later ever decreasing key travel) to the current x9 (which is basically just a yoga keyboard with no trackpoint, no key grouping, and the loss of pgup/pgdn). Things like the modular battery options vanished. The case got flimsier over time with e.g. the magnesium rollcage first vanishing from the display, then from the base. (And no - from enterprise experience - the carbon fiber composite isn't generally "as good or better", esp. for failure modes like punctual force on the display. Or...grabbing the laptop by the display and using it to fan your BBQ, which doesn't faze my old X41 :) ).
I think xx30-series has such a good reputation because you could use a T420 keyboard (with a tiny modification to better fit the chassis and not short out the backlight pin).
Also the Fn key is where the Ctrl key should be, which is endlessly annoying as a user of different laptop brands.
There's always been a bios option to swap them. It's on my x230, and probably exists on older PCs as well.
> The Fn key first debuted on the monochrome display ThinkPad 300 in October of 1992. Yes there was a ThinkPad with a monochrome display. The Fn key circa 1992 was placed exactly as it is today. Interestingly enough, Apple uses the same positions for their Fn and Ctrl keys as ThinkPad. Every other notebook personal computer manufacturer that I know of has the Fn and Ctrl key positions swapped. Some would say backwards.
https://web.archive.org/web/20110130203223/https://www.lenov...
Meanwhile my T420 still runs like on day one (which was already 5 years old when I got it, and travelled 1+ years with me in a backpack), the screen works in direct sunlight and it's not even the best of its series, hardware still perfect. Fat SSD + 32GB Ram and you can barely tell how old it is.
I’ve wanted to get a T480 for a while now (mainly to do a T25 frankenpad [1] – seems like a nice project), but if it really has those issues with the USB-C ports, I think I’ll pass :-(
Meanwhile, my T410 works great as a workbench computer.
http://web.archive.org/web/20200318130144/https://posts.nadi...
https://www.pcworld.com/article/2307079/dont-buy-these-dange...
I still have and regularly use a fully functional X200, somewhere in the box I have a fully functional T42 and an R31 whose only defect is a small screen blemish caused by me closing the lid with something on the keyboard.
But my multiple X1 Gen1 and Gen2 all have various failures (screen, battery, webcam, or keyboard), my T450 has big battery issues, my T470s have screen/GPU and battery issues. T490 is fine for now, X1 Gen11 has crappy battery and is overheating from the get go. These are different generations, different lots and still affected by the same constant issues.
At least a lot of modern ThinkPads are still modular. Recently got a 5th gen T14 AMD. Memory, NVMe SSD, WWAN modem, battery, and a bunch of other components are really easy to replace. I think I prefer the keyboard over my MBP, it feels less harsh.
In this case I was referring to post-T480 ThinkPads which have soldered memory, and no longer have hot-swappable batteries or on-board Ethernet.
They're still pretty easy to find replacements for when they go bad.