That claim might or might not be true (I tend to agree with it). On the whole, however, I think striving for thin and light has been a great thing, especially when you consider that for what most people do on their computers an entry-level MBP works great. And I really like that I can fit my 13" into a carrying case as slim and portable as this one. I love it.
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True, usually I don't need to travel with dongles/adapters. For those who do, it's different.
As for USB-C/Thunderbolt3 only, I'm glad Apple had the guts to get rid of the legacy ports, to help push the industry into what looks to be the right direction. The faster we leave old USB behind, the better, in my opinion. The new ports are much faster and much more versatile. I can see why consumers didn't like it, but I'm not going to blame Apple for doing the right thing.
The data I've seen says there is a rise in keyboard failure rate with the new MBPs, but a lower failure rate overall. that has to be kept in mind as well. So far, the new MBPs are failing less not more than their predecessors did. Nevertheless, this time I got AppleCare, just in case, something I'd never done before and never had an issue with as all my Apple products so far have worked faithfully for years and years.
Overall, I have to say my MBP feels well built. But one potential area where Apple might be getting cheap is thermal paste. Apparently, the paste Apple uses isn't that good. It gets old quick and causes the notebook to overheat. Switching to a higher quality paste (or liquid metal) gets the heat under control. At least according to this video and another one I saw:
Interesting. When I finally write continuous pages on it, let's see whether I feel the same way. Somebody told me that you have to learn to type softer on this keyboard since the keys don't require much force to register. Most of us are used to typing on the old keyboards, even on typewriters, where you really want to strike the key hard to make it register.