UDP is a lower level protocol than TCP so it's not an either/or as in "use UDP when low latency etc." is important and TCP when not. Rather, you'd want to use

UDP is a lower level protocol than TCP so it's not an either/or as in "use UDP when low latency etc." is important and TCP when not. Rather, you'd want to use a protocol built on UDP whenever you want something faster, better, more reliable than TCP.