Remaking a set of concrete stairs - GIF

Remaking a set of concrete stairs.

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Previously:

Trimming concrete stairs - GIF
Vibrating concrete on stairs - GIF
Wall folding fire exit stairs - GIF
Water cascading down subway stairs - GIF

What was wrong with the original steps?

Is it common to not put in some rebar, especially to tie into the existing concrete?

Look at the new stairs, same as the old stairs. Guess they had to spend that money before it was pulled back.