I am not really sure it is a bug but kernel 6.10.4 and 6.10.3 takes much longer to boot. I have attached dmesg and systemd-analyze blame logs for kernel 6.10.4, 6.10.3 and 6.8.12 (the last one I have before 6.10.x). Please note few seconds delay needed for root fs password after zfs module is loaded.
It looks like you can close this. Not sure what was changed but kernel version 6.11.7 seems to be booting comparable to the 6.9.9: stefan@p1g4:~$ more systemd-analyze-6.9.9-amd64.txt Startup finished in 10.628s (kernel) + 16.711s (userspace) = 27.340s graphical.target reached after 16.711s in userspace. stefan@p1g4:~$ more systemd-analyze-6.10.12-amd64.txt Startup finished in 19.842s (kernel) + 38.606s (userspace) = 58.449s graphical.target reached after 38.606s in userspace. stefan@p1g4:~$ more systemd-analyze-6.11.6-amd64.txt Startup finished in 17.807s (kernel) + 34.135s (userspace) = 51.942s graphical.target reached after 34.036s in userspace. stefan@p1g4:~$ more systemd-analyze-6.11.7-amd64.txt Startup finished in 11.853s (kernel) + 21.132s (userspace) = 32.985s graphical.target reached after 21.132s in userspace. Thank you, Michal