If they're smart, they'll HTTP 301 redirect these old URLs to new ones, if they ever decide to change them.
URI design is hard, especially when you're dealing with a single namespace on a site with massive scale like Twitter. But if everyone has their own namespace (it seems Medium is a good candidate for this), then you could as well use a human-readable timestamp in UTC (yyyy/mm/dd/hh-mm-ss), but they might be an eyesore for some.
The fashion these days tends to be short, mixed-case, untypable URIs that don't look like they'll stand the test of time.
URI design is hard, especially when you're dealing with a single namespace on a site with massive scale like Twitter. But if everyone has their own namespace (it seems Medium is a good candidate for this), then you could as well use a human-readable timestamp in UTC (yyyy/mm/dd/hh-mm-ss), but they might be an eyesore for some.
The fashion these days tends to be short, mixed-case, untypable URIs that don't look like they'll stand the test of time.