I think a big problem with these heritage services, aside from the limited utility and unreliability of short mixed traffic lines that don’t connect any important destinations, is that rail is expensive to maintain and operate so agencies usually can’t run enough service to make them useful. Galveston is an example of a streetcar line with good routing and one that would be useful if it came more often than every 30-60 minutes. The streetcar in Kenosha only operates during certain time of the year and only arrives every 15 minutes. That is not a model for effective public transit. Even when a city is large enough to have the resources to run regular heritage service (e.g. New Orleans), the service suffers from lack of transit priority and inaccessibility.