Don't waste valuable response time because integrated messaging frequently has curious inconsistencies that require verifying the report. Is it actually true or 'it always sends that and you can just ignore it'? Save thousands of dollars simply by making sure the messages you send are accurate and actionable.
We don't have to worry about 'old' equipment. No question about it; new toys are more exciting and fun. Designing an IT command center, however, that is not able to absorb anything but 'new' equipment is a disaster. At best, you end up with an expensive parallel department dedicated to the old technologies. At worst, you end up with the old equipment under-monitored. One is costly, the other is a catastrophe waiting to happen. It is so much better to include capability not only for your new toys but also for old favorites. The telco industry provides abundant evidence that equipment often remains in service far beyond its original 'expected' life. Remember also that equipment from other departments may end up under your monitoring authority as companies continue to consolidate. If your company is or may be in acquisition mode, this would also include technologies from other companies. Don't paint yourself in a corner by only considering contemporary technologies.