My previous machine was a W530 and the one I had before that was a T61p (with a T41p before that) and so I'm well used to this particular line of Thinkpad laptops.
Here's the specifications of the machine I've got, as ever there are variants of the P50 so if you have one or are thinking of getting one the specifications could be a little different but will be broadly similar to this:
- Intel(R) Core(TM) i7-6820HQ CPU @ 2.70GHz (5433.79 bogomips in Linux)
The same can't be said of the GPU benchmarks though so it looks like GPUs are continuing to gain in power even when CPU speed increases have run out of steam:
The other noticeable difference I hadn't spotted before is the battery size. That's very apparent when you pick the machine up as it's actually a little bit thinner (probably also due to the lack of DVD/combo drive) as well as not as deep i.e. it doesn't have the big battery sticking out of the back that has been common place on this line of Thinkpad machines over the past decade or so. I'm guessing (without having done any research on the matter) that this is probably due to improvements in battery technology so I'd think Lenovo have probably moved over to Li-ion or Li-po batteries.
In terms of running and using the machine, it does seem very nice so far as one might expect. It's running Fedora 25 very nicely and hasn't caused me any issues at all during setup. I'm not really expecting any either as most if not all of the hardware seems pretty well support by Linux these days. I think, in fact, Lenovo even offer to supply this machine pre-installed with Linux if you want. That said, there looks to be one possible sticking point in terms of hardware support at the moment but this is very minor. That is, the build-in fingerprint reader doesn't seem to have a driver available on Linux yet. I did some very brief research into this yesterday and it's not clear why vendor support is lacking for the device at the moment although I did find at least one effort that has gone a fairly long way towards reverse engineering it and starting to write a driver so I would guess within the next year we'll see some sort of support for the fingerprint reader too.
All in all then it's a good machine even though it's not a huge upgrade over my 4 year old laptop!