Thanks, here are the big hitters are the top.
2min 527ms systemd-udev-settle.service >
6.018s NetworkManager-wait-online.service >
3.044s apt-daily.service >
1.495s networking.service >
677ms man-db.service >
647ms motd-news.service >
632ms systemd-logind.service >
345ms apt-daily-upgrade.service >
335ms firewalld.service
systemd-udev-settle.service
This service actually does very little: it just waits for the device probing being done by udev to finish and then exits. It is also used by storage devices such as RAID and LVM, maybe a non-existent 3g Modem, USB ports, etc.
On my part, I have masked NetworkManager-wait-online, MOTD, apt-daily-upgrade, ModemManager, nmbd, etc since I don not use them.