The Stardew Valley 1.6.4 update is now live on PC and it is surprisingly beefy, including new content, balance changes, visual improvements, fixes, and gameplay tweaks.
The 1.6.4 update was announced on April 10 with virtually no detail, as is the Eric Barone way, except that it would include "a new fishing thing, and some new mining-related stuff" and was expected to be ready "sometime next week," which of course is now this week.
(Image credit: Eric Barone (Twitter))The mine stuff...