Not so many. My grandfather had a 28" Diamant sports bike which he kept "refining" over the years. In the end he had a 2x10 drivetrain. He rode it everywhere.
This was the model but he had a self made aluminum basket for his old dog on it.
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My first bike was my cousin's old Blitz in 12" and then a 20-inch Mifa.
Like these two:
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One of my friends even had this bad boy:
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I always wanted a BMX but there's a saying about life in the GDR:
"We had nothing, not even hunger".
Accordingly, my grandfather's motto was "ride what you have, 20" is 20", you can also ride BMX on a Mifa. What is that supposed to be anyway? BMX?"
I later had a 26" road bike and finally my first MTB in the mid-90s. It was a cheap Everest but still that changed everything.