systemd vs xinetd

I have a CentOS 7 system which uses systemd, and I want to start a tftp server. I'm confused about the right way to do this. I've seen some posts that say install xinetd and launch it from there (like pre-systemd), and other posts that say enable tftp.socket Is xinetd just a bridge to systemctl socket which will eventually go away? If so, where would I place my tftp configuration settings (since the xinetd tftp file would not be used)