Yes, because removing legacy ports makes sense when you're including USB-C/Thunderbolt 3 ports that have the bandwidth and compatibility to handle pretty much any peripheral connection you can think of. There's no need for the laptop to act as the hub anymore. The user can buy an external hub that contains the number/variety of legacy ports that suits their purposes best and then plug it into a single USB-C/Thunderbolt 3 port.
there's no need for a laptop to stay put on the desk either. Still loads of people buy a laptop to put it on a desk and never remove it.
Also a lot of people remove it to write, watch, and read in bed or the sofa. All good. No problem with that.
My workflow is alas seriously messed up with only 4 usb-c ports. I do some work on the road (I'm not a full time pro, I use my rMBP to make some extra income). And for that I need to plug my SD card in, I use the HDMI to show stuff on a clients TV (to have some decision making going), in 90% of the time the client gives me a usb stick to plug in on the spot and more than once there are more people in the room that walk around so magsafe saved my laptop numerous times.
I speak only for myself off course and I admit that the new MBP is very powerfull and that USB-C is a very capable connector that will stay for some 10 years until it's successor comes around. But while I'm on the road, I don't want to work with dongles and hubs. It just isn't that practical. It makes no sense to shave of a few mm and grams just to drag around a hub that weighs more and is bigger than the dimension gain. I can't speak for the TBar since I haven't used it, but I don't see the added value for my workflow. I only have two hands and I'm not ready to slide some stuff on the Tbar with my nose.
I saved up for a new MBP, but I will buy apple stock instead and bet on the "starbuck"people as someone called them to make the new TBMBP a succes. My rMBP will last for another three cycles. I'm not screaming that I will go to windows, please no. But I will not buy the TBMBP for the next three years. And by then maybe I have a new workflow. If not there's always a second hand 2015 rMBP.
The thing I don't understand though, if the new TBMBP is doing so well, how come that the refurbished older gen's are depleted? Must be a lot of buyers who opt for an older version and must be that a lot of potential sellers hang on to the model. Or has apple destroyed them to have less options and push sales of the TBMBP?