I personally own a decently used ThinkPad X1 Carbon Gen 6 which, if you look on my history of posting here, I've bought fried and replaced the motherboard and battery on. I had the experience to hold and feel both a T14 Gen 5 and Gen 3, but if I compare them in practicality of what can my X1 do against those, it has more features than compromises.
The deeper key-travel is one of the first things you'd ever notice on this X1 compared to a modern ThinkPad, like I can type for hours on this thing and my fingers aren't hurting from it, and I get almost the same typing speeds I have on my Keychron C3 Pro Apex Red switches mechanical keyboard.
Another quirk of my X1 compared to a T14G3, which is what my friend has settled with after we almost got scammed at a pawn shop with the Gen 5 (supervisor password and pawn shop guys we're dumbasses), is both the feel, slimness and the ability to slot a 2280 nvme, 2242 nvme, and a microsd card in one place.
Another difference is be the bigger battery than the Gen 3, having 57Wh instead of 52.3Wh. It's not a major difference, I know, but it is at least half an hour to an hour of battery life. Then there's also the keyboard backlight being dimmer. I can light up my bedroom at night with the keyboard at max brightness on the X1, and even see the keys being light up during the day if i put the brightness at max, but not with the Gen 3 at all. And, I'm not a trackpoint user at all, but I love me some good feeling trackpoint buttons because I physically click those buttons whenever I use the trackpad, it's just feeling better for me to use the trackpad in that combo. And also, the socketed wifi on my x1 vs soldered on the Gen 3. Really Lenovo? Soldered wifi??
Anyway, I just wanna hear some opinions from people regards how they see modern ThinkPads. This whole curiosity came today after comparing what I got on my X1, including how the machine feels like, to my friend's T14, because he peaked my interest in upgrading, but I don't like the modern designs because they still broke that familiarity philosophy.