Is the MITRE ATT&CK really that influential?

While I am a huge admirer of MITRE ATT&CK project, I wonder what do seasoned blue teamers (those who were professionals before ATT&CK became a thing) think about it? It is a relatively new concept and it really helps me personally with decision making when investigating incidents, but what are your thoughts about it?

amp att blue concept cybersecurity decision decision making incidents making mitre mitre att&amp mitre att&ck professionals project thoughts