Empty Commercial Spaces in Malden

I"ve been noticing empty commercial spaces in Malden, but even elsewhere around boston. Is commercial real estate taking a hit? are the prices in Boston too astronomical and not worth investing in?

There's a big hole of a former building they razed down on 432 Main street that used to have offices.

The Citizens bank on main street is also still empty.

Exchange 200 - the two restaurants shut down and are now empty.

The former DESE building is still empty.

The space besides the former Dockside seems to have been razed down and is now empty 303 commercial street.