The primary benefits of QUIC apply in scenarios where you have some packet loss, and are multiplexing multiple independent "transactions" (DB queries, HTTP req's, gRPC calls etc.) over a single connection.

Multiplexing is very common but unless you are at megacorp scale (or operating a cloud hosting platform) packetloss within your own wired network infrastructure isn't a super common issue. Compared to say packetloss to mobile clients on bad networks where QUIC can really provide a significantly improved experience.