Monitor speakers plug into a monitor??
Duh.
Monitor speakers are a type of speaker with a flat frequency response. Nothing to do with display monitors. USB Monitor speakers have a built-in DAC and connect via USB2 (which is more than fast enough) which is handy since the SPDIF/optical output has also disappeared from newer Macs.
I'm sure that there are types of USB devices that
I've never heard of, too. Bet most of them have USB-A, though...
The bonus to USB C is the large bandwidth
Ah, back to USB Alternative Truth mode again. Until computers and peripherals with USB 3.2 (which can double-up USB3.1 lanes) appear,
the USB bandwidth of a USB-C port is just the same as the bandwidth of a single USB-A port. If you get a USB-C hub with (say) 3 USB sockets, a SD card and sound
then all of those sockets are sharing a single USB 3.1 connection to your Mac. Probably just 5Gbps 3.1g1, at that (its hard to tell without having a particular dock to test).
USB 3.2 has only recently been announced and shouldn't be confused with 10Gbps USB3.1gen2 (which is completely independent of USB-C and can work over USB3 A-connectors) - not that there are that many devices out there that support 3.1gen2, either.
Yes, there is TB3 - same connector, different cables, different peripherals, much better bandwidth. Make that
$300 for a dock rather than your $65 USB-C option and, yes, you should get full bandwidth on all the dock's ports.
Yes, USB-C can carry DisplayPort/HDMI - but until USB-C controllers start supporting DP1.4, at 4k@60Hz any USB devices on the same port get throttled to USB 2 speeds. Or, pay the premium for TB3 equipment.
And, yes, there is USB-C charging - except few of the cheaper USB-C hubs deliver enough power for the higher-end MBPs.
...and if Apple had simply upgraded the existing TB2 ports to TB3, we could have had the single-port docking and charging you evidently love and
still be able to connect existing stuff directly when we were away from our docking station...
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Less peripheral bandwidth, slower processors, slower RAM, slower SSDs, no touch bar.
...all of which could have been added to the 2015 design without throwing out the great keyboard and so-called-legacy connectivity. We could also have enjoyed the improved battery life for general use offered by the new CPUs - instead, Apple have made the battery smaller (...and, surprise, that reduces the life as soon as you move beyond general use)
The "Less peripheral bandwidth" claim depends very much on how many of the 2016's TB3 measly 2-4 I/O ports you clog up with low-bandwidth USB devices and chargers - or displays that could have connected via HDMI and been driven directly by the GPU without affecting your general I/O bandwidth.
Just change the two DisplayPort/TB2 connectors to TB3 (nobodies saying that the new MBP shouldn't have had
any TB3/USB-C ports) and we'd have been able to connect a charger, a HDMI display, a SD card, a couple of USB-A devices before we'd even began to tap the potential of 40Gbps of TB3... and (get this) we would
still have had the option of single-cable docking if we wanted it.