A stopped line is measured in money per minute. push.tt puts the operator who found the fault and the engineer who can fix it on the same channel, immediately.
A channel per line and a channel per shift, with maintenance sitting in the ones that matter to them, means a fault is announced once and heard by everyone who can act.
The channel history is a radio log with durations to a tenth of a second, not a wall of chat bubbles — which is what a downtime investigation actually needs.
Fault codes, yields and supplier names are commercially sensitive, and on most PTT platforms they sit in plaintext on somebody else's servers.
Put one line and its maintenance cover on a channel and measure the difference.