Even if you think what you would say is obvious, please add. This is genuinely something I think makes sense regarding local bus routes given the longevity of light rail and how infrequently routes change, but I also suffer from confirmation bias, so I’m hoping for reasons this would be a terrible idea but obviously would prefer reasons it would be an even more amazing idea than I thought.
IMO it should be a progressive transformation. First light bus coverage, then more frequent busses and longer busses, then once the line is packed elevated light rails with remote control. The goal should always be to carry more people with less effort. Busses can be deployed quickly. Rails are a better long term solution.