I think the blog posts do a great job of telling us admins out there where the Exchange team's head is or was at when whatever was developed and why. I certainly hope the blog sticks around.
I will say I have been disappointed that the content here has gone pretty much 90+% Exchange Online/cloud centric. It seems like we got a lot of quality content here for Exchange 2013, then not too much for Exchange 2016, and practically nothing at all for Exchange 2019. I get it, Microsoft wants everyone paying monthly subscriptions and wants Exchange to be a SaaS, but we're staying on prem (not because we can't migrate to "the cloud" but because we don't want to) and it would be nice to see some content geared toward us. Its ok to talk to us about Exchange 2019, I promise :)
Just my $0.02.