I, too, miss the Key Developments update. I am trying to avoid “news” and instead consume factual information about current events – not Op-eds on Op-eds. The Key Dev posts are very concise, pertinent and non-political which I really appreciate nowadays. The other topics are great! But not why I came to the Blog.
I have the 7500 from 3M as well and can breathe pretty well after taping a cutoff piece of surgical mask over the exhalation valve. According to the CDC: “If you only have a respirator with an exhalation valve available, cover the exhalation valve with a facemask (surgical or procedure mask) that does not interfere with the respirator fit.” Trying to wear a facemask over the 7500 was challenging to keep in place (and probably looked hilarious) so I opted for the tape-in-place method.