You probably meant "state appropriation of all businesses", the word "all" is very important because almost all capitalist economies have some state owned businesses. The second sentence is also wrong, "state appropriation of all businesses" is the very first step in socialism and not a last resort, there is no socialism without the public ownership ( through the state or Worker cooperatives) of almost all businesses.
So Bernie missing this core characteristic of socialism in his policies is very important.
Venezuela did not started by nationalizing all the industry, they did some at a time, and at the beginning none where taken over. When ever they needed more money cuz they destroyed the first buisnes they took over, they move on to the next one. The latest things they took over was personal homes to turn a area into a turist atraction.
The same will be with berni and the rest of the democrats runing on socialism. When its ovbious that they cant pay for it, another sector will suffer and so on and so on, just like venezuela.
It takes genuine talent to see greatness in yourself despite your absence of genuine talent.