What constituted the assembly bottleneck before the sewing machine's breakthrough?

Answer

The speed of the human hand replicating the lockstitch thousands of times.

Before the widespread adoption of the sewing machine, the process of turning flat woven material into a three-dimensional garment was entirely dependent on human dexterity and speed. A skilled tailor required days to finish a single suit or dress because the fundamental stitch, the lockstitch, had to be formed one by one by hand. This intense time commitment, even when textile materials became cheaper due to early industrialization, kept the labor cost prohibitively high, maintaining clothing as a costly item reserved for those who could afford regular replacement or repair. The machine was the key needed to overcome this limitation in construction speed.

What constituted the assembly bottleneck before the sewing machine's breakthrough?
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