The short answer from many folks may be: as long as there are food delivery services, package delivery companies, and ride shares, then enforcement has to be limited. But I’m sorry, that’s just not good enough.
Almost every major square/commercial district in Boston, Cambridge, Somerville, Brookline, and other areas is clogged with cars either illegally standing with no driver in sight, double-parked cars, and even triple-parked cars. Mopeds and scooters are hardly better. Lanes of travel are frequently blocked, including city buses and emergency vehicles. Beyond the legality, it's as if the social stigma that such driving behavior is not acceptable absent exigent circumstances has totally gone out the window.
And regarding enforcement, the battle already seems lost. Unless sufficient numbers of police or traffic enforcement are physically present to observe illegal standing or double-parking enough to issue citations, there will be little done to dissuade this behavior. The businesses that benefit from unsafe delivery drivers are all too happy for this to continue, particularly the large chain restaurants like Chipotle and Chick-fil-A, as much of their sales comes through Doordash, Grubhub, and Uber Eats.
Every single official deterrent (i.e. legal, law enforcement, etc.) and social deterrent (i.e. it's just not an acceptable way to handle a vehicle in a busy city) appear to be dead ends, so I'm not sure how this will be improved absent a massive uptick in surveillance and license plate monitoring, and the collective appetite for that seems low. So what's to be done?