The Wikipedia article implies a consensus on electrification and budgetary issues for Boston, but Alon Levy is a better source and I doubt anything major changed in that time frame (even if according to the wikipedia page first test runs are planned for 2023 on already electrified track). That's even worse, artificially pushing expected costs up for common sense things is ... something else.

Very glad germany has the opposite problem (Schönrechnen), where expected value is artificially kept high and expected costs low for politically wanted rail projects. It's also bad, but less so?