One connect boxes seems appealing due to some benefits and Samsung made it look premium by hiking price on models with one Connect Box. However, I feel it is extra risk and cost for the user. Let us say the One Connect Box goes bad and I am out of warranty and I have to buy it. Some undesirable things could happen.
The Box quality is most likely low as compared to hardware that is builtin, so it could be prone to wear and tear, physical damage, etc.
The Box could be very expensive.
The Box could be unavailable in the market.
To sum up, I don't want to lose my TV because of an external device. I would love it if Samsung provides one connect box in addition to builtin ports.