Cloudflare, among others, has a feature called "CNAME flattening" that resolves the CNAME to an IP and serves it up as an A record. It makes this articles point

Cloudflare, among others, has a feature called "CNAME flattening" that resolves the CNAME to an IP and serves it up as an A record. It makes this articles point a non-issue, and in fact probably results in a faster DNS lookup. The only drawback is that it is unclear how often they refresh the value.