I bought last year mobo with IPMI so in theory I could have forgot about SSH and just inspect startup logs if it would fail to start.

Though I must say I am not brave enough and my family uses it so I prefer to have jest one broken service instead of enire machine.

But it is possible.

Except you've replaced something good with something worse. IPMI really isn't an improvement over having SSH to the system. It definitely has more security holes.