...It would help me to understand what you're actually trying to say...
If I may, I think the concern that was being expressed here - and by me is this.
1. No one likes to repeatedly purchase new adapters each time we buy a new laptop. (FW400 to FW800 to Thunderbolt to USB-C)
2. I also would like to carry the lest amount of accessories when I travel. (external hard drive - SSD is still too costly and not large enough, external DVD if you still have that need - like me)
3. Most importantly, you can clearly see the trend Apple is on. Over time, in an effort for a thinner device (that is not always a priority for the user) we have lost or are losing the ability to easily change the battery, ram and hard drive on any laptop. Optical? Gone. And yes with optical, we knew it was going to happen eventually, but Apple being out front on this means it's more painful for us Apple laptop users. (Just because I have to use Dropbox to share a 2GB or 3GB file doesn't mean I prefer that over optical or a removable flash drive, and in case you were thinking of mentioning it - Airdrop is still a joke). Mac Laptops are not quite there yet, but like my iPad are becoming sealed and not expandable with no external ports besides a headphone jack and maybe a charging port.
So if you are like me and have replaced your desktop mac with a MBP, and still travel often with your laptop, the trend Apple is on doesn't look promising.