Is that an issue with the architecture of the DC Metro, or just the design of its "accessories?" Glass walls to prevent people from falling into the tracks were

Is that an issue with the architecture of the DC Metro, or just the design of its "accessories?" Glass walls to prevent people from falling into the tracks weren't a thing when most subways were constructed in America. It's possible to retrofit the DC Metro to keep its (arguably) beautiful ceilings [0], while still making it safe and navigable for commuters. [0] https://upload.wikimedia.org/wikipedia/commons/4/42/WMATA_Metro_Center_crossvault_2009.jpg https://upload.wikimedia.org/wikipedia/commons/4/42/WMATA_Me...