[kkielhofner]

TTL isn't universally respected. Consider the following path:

Your machine -> Local router -> Configured upstream DNS Server (ISP/CF/Quad8/etc) -> ? -> Authoritative DNS Server

Any one of those layers can override/mess with/cache in a variety of ways including TTL. This is why Cloudflare and a variety of other providers use IP anycast. They accepted DNS for what it is and worked around it.

Not only is the IP always the IP, the "global" BGP routing table actually universally and consistently updates much faster than DNS. Then whatever routers, machines, etc downstream from that don't matter.