I have a couple older scanners like you mention. While I use a different one to monitor the trunked systems I'm interested in, I keep the older ones for much of the reason you're looking for (I think). Like you, I'd use it for the interop channels and others you mentioned, but I'd include some of the local ham repeaters. In fact, during severe weather, I use the analog scanners for just that purpose while my other scanner works public safety freqs.i know my local state and county frequencies. got the vtac, utac and other interoperability channels,, red cross, aircraft emergency channel. there could be something im not thinking off. this site doesn't show logs from some major events in the past.