Chargen isn't that popular now.

The big things these days are:

spoofers who generate a ton of syns to legit destinations which result in a lot of syn+ack to the victim. Bcp38 would help here.

Botnets generating a ton of UDP to destinations. Hosters, cloud providers (especially those with vulnerable/open EMR clusters) and broadband ISPs with easily compromised customers are the problem here. Kudos to those who take down the botnet command and controls.

Memached/ntp/cldap amplifiers. Still out there, still a problem. Thankfully a few of these services are policed at large peering interconnection points.