I'm honestly baffled, 6 core and 32G of ram is pretty cool for a mobile device. I've got a loaded 2016, Skylake 2.9GHz i7, 16gb ram, RP 460 with a replaced 2017 Keyboard. Not sure what to do? Is this update significant enough to try and offload the 2016 and shell out some dough? What are others thinking?
I don't know what your use cases are. But I can tell you what mine is and what I've found so far from reading stuff online talking to people etc.
I'm a designer by profession and sometimes I do development work on my mac as well. My primary concern is whether or now having 2 extra cores would make things microsecond faster or not. For example when u click on Photoshop icon or system pref. icon in dock, how fast it opens - stuff like that. In my use case sustained work load isn't a thing. Unless I'm playing tomb raider in which case the CPU gets quite high (IIRC). What I'be been told is that, the new models don't make day to day usage any faster in any meaningful way that I could notice. So on that note I'm good; no apparent reason to look for an upgrade. (I own a 2017 13" entry touchbar by the way)
However I get that new model adds a bunch of features. Like better display (not exactly if trueTone is useless to you), better sound, Bluetooth 5.0, slight faster SSD, higher freq. RAM, etc. Thing is these things won't make enough of a change in my daily usage for which I can justify the high price tag. I already like the sound, I don't have (or probably won't own one in a year or two) a Bluetooth 5.0 device, SSD speed I won't notice for sure, RAM definitely not.
I've seen couple of established youtubers say that they definitely don't recommend upgrade from 2017 models. And some feel the same for 2016/2017 that the upgrade isn't worth the price unless you can justify the price you'll pay for new features.
So to summarise my answer to your question - I don't know.
I am also curious about what others are thinking; hence this thread I posted. Everybody would love to always have latest and greatest in tech. I will too. But I already have a system that does the job that I want it to do(for the most parts). From what I can tell, if you have any reason to not like your computer, then look for things that can make your computing easy. (That's what I tell myself when I'm in doubt
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P.S. About keyboard. I love mine. Only once in the past 11 months the left CMD button got something stuck underneath it for which the button was feeling mushy and hard to press. But after a couple of hours it went away automatically.