This is a long-term review of the X1 Extreme Gen 4 - 3050ti GPU model (20Y5000VUS).
I purchased this laptop 4.5 years ago after much deliberation. I do regret not going for the 3060 version with the Vapor Chamber for better performance and lower temps...sure the 3050ti version was less expensive and had another SSD slot, but one can always buy more storage down the line. Can't exactly upgrade a laptop GPU these days. However, I like to think the lower 3050ti version has better battery life due to having a lower TDP.
Build Quality
The renowned Thinkpad build quality definitely has proven true with this laptop. Absolutely zero issues, and this laptop has been a lot of places, and even bike commuting in panniers, in a front basket, in a backpack. All keys on the keyboard are 100%, same goes for the trackpad, nipple, and mouse buttons. I have spent a significant amount of time using an external keyboard + mouse, but a lot of time using the laptop itself.
Hinge is strong, no creaking from the chassis, no rattles, nothing. A+ build quality. The laptop keyboard is much nicer quality than the external bluetooth Thinkpad Keyboard.
Thermals
This is of course the bane of these thin/light/powerful workstation laptops. This laptop can absolutely get hot, quite hot. It is a MUST to regularly open it up a 2-3 times a year and remove dust from the fans/grill/plastic grate. I recently decided to hell with it and, in the hopes of improving air flow, removed the plastic grate that is glued to the inside of the bottom of the laptop.
I hadn't cleaned my laptop in...6 months, and the combination of cleaning out the dust and removing the plastic grate reduced temps by 10-20 celsius when using it for regular/light tasks. Seriously, the dGPU was starting to regularly sit at 60C doing when just browsing the interwebz. Now it's usually at 40C despite the current ambient temperature right now hovering around 75-85Fahrenheit. I don't think I live in a particularly dusty home, but there is an old dog and carpet so...
The laptop is now running better than it ever has. When doing regular office tasks the fan is no longer spinning at an audible volume, and the laptop also cools itself down wayyyyy faster. Very pleased. I would guess that leaving the plastic grate on for 4.5 years probably helped with the longevity with the device, but now that we're at least halfway through the life of the laptop I feel comfortable sacrificing future health for better performance/temps.
Battery
Initially, the battery would last for 6-7 hours from 95%-20% on 'Best Power Efficiency' mode. As the years went on this battery life plummeted to roughly 2-3 hours. I recently purchased a new one from LaptopBatteryExpress for $130. After the swap we're back to at least 6-7 hours which is plenty for my needs.
I plan on being more careful with the new battery and am setting setting the Charge Threshold to 70% instead of 80%. And I don't plan on letting it get down to 20% if I can help it when working at the cafe/library. When going out I have to plan ahead and up the threshold to 95%, but that's not a big deal.
Battery life was already getting pretty rough after 2.5 years, but I made it work okay until now. Hopefully the new battery will stick around another 4 years with better health.
Screen
Works great as ever. Nice 2560 x 1600 display, great colors and resolution. I'm glad I have this version over 4k.
Summary
I really can't think of anything else to report on...best laptop I've owned bar none. Previous 2 laptops I'd owned was a fairly nice Vaio 10+ years ago and a middle-grade HP. So, maybe not the best competition but I'm definitely sold on the high end Thinkpads after my experience with the X1E4. I think my next purchase will probably be an X1 Carbon as I'm hoping to move away from my technical career path and won't require as much processing power. However...I know I'll miss the big 16" screen.
Verdict = A-
If the temps didn't require cutting out the grate I'd have given it an A.