It is concerning right now, but the "let it grow in" sentiment can't be stated enough. I remember how reviled the Greenway was back in 2006ish when first unveiled as a barren hellscape that was "no better than a traffic island." Twenty years on, some (not all, granted) blocks are a shocking oasis in the heart of a major American city.
One of my favorite views to emphasize that is at the corner of Atlantic and Seaport Blvd (across Atlantic from Hook Lobster)...
2007:
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2011:
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2018:
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2024:
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Despite being wedged between two ramps and a busy cross street, this parcel is surprisingly enjoyable; give Copley time and maybe it will need to evolve with some direct human intervention in addition to organic canopy growth.