I think the reuse of classic calls is an interesting homage to the past, given that's about all it could be.
Most every station around here is running a format that drastically differs from the old 3-letter days. (K)KOL, (K)KXA, (K)KJR and (K)KMO bear no resemblance to their former selves. Now, the venerable KGY is just a slogan on a translator. KLSY, KNBQ, KAYO, KGHO, KUUU, KSND and KBRD still exist, but not where they started. KRSC is a Spanish station in Othello. Except for, maybe, KGY, you'd have to be near your '50s to remember what these stations were in their heyday.
As for bringing back the good old days on one of these stations... please recall "Oldies 570, KVI". That effort... not that long ago, lasted only a short time before less-sentimental folk wrested back programming authority.
BTW... none of the above examples are Salem stations.
Were I to get sentimental, I'd take Yakima's KUTI back to 980, where it started, and put country back on it. The community would be expected to turn out in vast droves whenever we were to show up at a local auto parts store in our gaudy-yellow Corvair remote van, merely to show off and sell windshield wipers... as we did in the early '70s. During the Yakima County Fair, our full-day remotes from the pig barn would be enthusiastically attended as well. KMWX would return... back on 1460, with their adult hits format. KQOT (quote radio) would resurface on 930, replete with its normal, awful, RF-infused, teen-ager-presented top-40 audio and barely-working Mackenzie repeaters. KAAR (Kay-All-American-Radio) would return as Yakima's first, struggling, country FM station. KIT, then Yakima's version of KOMO, would take home most of the advertising revenue.
Why not?