The weaknesses and failures of incrementalism

This is a hard topic for me personally, so please be gentle. I am at my core an institutionalist and an incrementalist, so I tend to want to both value and improve institutions through incremental (bit-by-bit) change.

A common concern and criticism of people who are impatient with incremental changes is that there would be tons of unintended consequences. While that concern resonates with me, it clearly doesn't seem to resonate with much of anyone else right now.

So in this I feel alone, frankly, and a lot of the reason for that loneliness is because incrementalism seems to have been firmly rebuked by both left and right wing political groups around the world. Help me understand what's happening. Where is incrementalism failing for you? Do you see any role for bit-by-bit change?

The scope of this thread could expand to the high heavens, so please understand how widely varied the examples might be that we each might bring to this discussion.