And before that people were using serial ports. And floppy disks. And riding horse carriages. By your logic all progress should be stopped because old technology is still in use. Not to mention that USB-C is becoming quite wide-spread on the market and other manufacturers, like Dell, are switching to USB-C only designs.
Because USB Type C does everything these connectors do and does it better (except the MagSafe of course, but thats a minor issue)
Most of it is forward-thinking engineering actually
Keyboard is perfectly functional, might be not to everyone's liking but then again, so are mechanical keyboards with their quite ridiculous travel (for example, I always preferred shallow keyboards because I find them more pleasant and convenient to type on). Glued batteries etc, yes, thats rather modern, since most laptop manufacturers are using similar tech. You need to choose between user-replaceable battery and large battery — can't really have both (unless you want to sacrifice portability). Same with RAM — you can have replaceable RAM or battery-efficient RAM. Engineering is all about finding tradeoffs. You might disagree with tradeoffs Apple decided to do, but then again, nobody is forcing you to buy their products. There area nought computers on the market you might find more attractive.
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Really? Based on "Jony says he listens?" Listens to what, excellent sale statistics of the 2016/2017 laptops? Or the fact that Dell is changing the XPS design to basically exactly mirror the 2016/2017 MBP (would they do it if that design were so problematic?).
The way I see it, we might get some changes to the keyboard, since that seems to be the biggest point of criticism (nd there are indeed some engineering issues here), maybe some tweaks to the Touch Bar, maybe (but unlikely) the card reader back. If they use new Intel's G series, we could also get larger battery and/or 32GB of LPDDR3 RAM (the later is rather unlikely though). There is no way they would regress to less functional ports at this point though.