The replacement for the Mt. Auburn Darwin's will soon be Roust Coffee, going into the same location. Cafe Faro advertised a ton at the Cambridge locale in the final days... could be a Putnam replacement... seems really over-the-top hipster though.

We'll be fine on coffee, so many great options (Barismo, Broadsheet, 1369, Cicada, so many others).

Sandwiches is a bit tougher... especially Cambridge and Putnam, as they were "strategically located" far enough from Harvard and Inman that they didn't face much competition, but that means that there are few other options in the area.

Harvard Market is solid, another Somerville-side option is P&K Deli. Giant, high-quality subs for a good price. Darwin's always felt like walking into a 1999 vibe... P&K feels like walking into 1979.