The new CJCS nominee is an Air National Guard guy, too. I don't believe we've ever had a Reserve or Guard CJCS.
Having served under Brown as PACAF/CC, on the Air Staff when he was CSAf, and on the JCS, I don't think he was woke like he is made out to be (and I despise DEI in the military). He made some mistakes wading into the post George Floyd messaging and signed off on a memo the SecAF and UnderSecAF championed to put quotas (seemingly) on race based recruiting. But he was vocal about how he did not favor tipping the scales in favor of one group because it takes away from another, which is the antitheses of DEI. The USecAF at the time was only focused on DEI BS and Brown is a casualty of it, IMO.
His priorities as CSAF and CJCS were in alignment with Trump and Hegseth, even before they got into office, but he committed a few unforgivable sins to the anti-DEI movement. It is a shame. He was actually a major improvement over Milley as Chairman.