Most real efforts here include OTHER steps to calm traffic, and then a painted cross-walk is added to attract pedestrians to that area. I hope Boston is doing more than just slapping crosswalks down with paint on high speed multi-lane roads - because people will be killed. Reducing lanes of traffic where peds cross, slowing traffic (stop signs, lights, speed limits with enforcement) all are much better starting point.
This is especially true when turning right at a yield sign, e.g. https://drivinginstructorblog.com/wp-content/uploads/2013/06...
What happens when you splatter crosswalk everywhere is they lose some of their subconscious meaning because you de-link them from actual pedestrian use potentially.
In Cambridge MA there are some otherwise uncontrolled crosswalks across Mass Ave and, as a driver, I'm definitely a bit more prepared for there to be a pedestrian at that location compared to darting across a random stretch of busy road (though that happens too all the time and I keep my eyes out). That said, as a pedestrian, I don't really trust a driver to see me especially in lower visibility so I generally won't cross at those locations unless I have plenty of opening.
[1] https://www.boston.gov/departments/transportation/tremont-st...