I used a ThinkPad 700 in 1992 and have bought ThinkPads ever since. Lenovo keep trying to ruin them while ignoring customers telling them to stop.
A ThinkPad
1. Is robust
2. Is reliable
3. Is black
4. Has only useful software pre-installed, from the manufacturer (e.g. the Lenovo thing which updates drivers)
5. Has a TrackPoint
6. Has a consistent keyboard layout
7. Has hardware buttons ('mouse', function keys, etc.)
8. Has a functional screen
Every few months David Hill of Lenovo starts crowing about some new ThinkPad where they've 'innovated' by breaking one or more of these features, usually the keyboard layout or the hardware buttons. There is then a storm in the comments, which is ignored, then they put the thing out, and people skip that model, then they think 'maybe we should listen to our customers' and put it back as it was. Then they make the same mistake again.
The last two X1 Carbons are a perfect example of this. They turned the TrackPoint buttons and function keys into 'touch' buttons. Everyone said it was a bad idea, but they did it anyway, then quickly reversed the decision for the next iteration.
They're going to keep making this sort of mistake, because there's a problem in understanding their customers which doesn't seem to be getting fixed - so it's probably at a high level.
What I'd like to see is another manufacturer step up and make a ThinkPad-ish line, so that Lenovo can be taught a lesson by having their customers abscond. They might then realise that they can't keep doing this and put in place a policy of keeping a line of ThinkPads for their ThinkPad-loving customer base.
Now that they've diluted the brand by making some terrible laptops with ThinkPad stamped on them, though, (W, E, L series, etc.) they should probably have some other mark on their 'proper' ThinkPads, i.e. their X and T series.