JFYI, Devuan Beowulf system with dhcpcd/wpa_supplicant setup is not able to reconnect automatically to my wifi network with that intel-microcode version. The old version 20190618.1 works!

Both microcodes connect fine on boot. But then, only the old microcode allows automatic reconnects. Whysoever

Some system infos:

Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz
Intel Corporation Wireless-AC 9260 (rev 29)

Working wifi:
[    0.000000] microcode: microcode updated early to revision 0xb4, date = 2019-04-01
[    1.547370] microcode: sig=0x806ea, pf=0x80, revision=0xb4
[    1.547652] microcode: Microcode Update Driver: v2.2.

Broken wifi:
[    0.000000] microcode: microcode updated early to revision 0xc6, date = 2019-08-14
[    1.635718] microcode: sig=0x806ea, pf=0x80, revision=0xc6
[    1.636029] microcode: Microcode Update Driver: v2.2.

Have fun!