Switched to some “Argon One M.2 für Raspberry Pi 4”
and one again came across this. Wow. Added quirks and stuff is fast again.
Used some really cheap M.2 SSD:
max@homeassistant:~$ cat /boot/firmware/cmdline.txt
usb-storage.quirks=174c:1156:u console=tty0 console=ttyS1,115200 root=/dev/sda2 rw fsck.repair=yes net.ifnames=0 rootwait