It appears 97X is not cluing in it's listener base about the change that is coming. There is no local media stories that I know of that making anything pubic. In my opinion it wrong to drop a format and flip a switch at 5pm on a given Friday, especially in a different language. Loyal alt music listeners will be angry if it does.
Or is this the heartless ways that radio companies operate.
This is not heartless.
First, the existing audience is still, obviously, enjoying the programming and the advertisers are getting their money's worth. Announcing a change drives listeners away and causes advertisers to get less than what they paid for.
And stations don't want the competition to know about the change.
Format switches are done, almost always, with no advance notice. In the 60's and 70's, it was common to have the new staff waiting "in secret" in a hotel ready for the owner or manager to call and say, "the old staff is gone. Come on over and launch".
I've done a number of switches. None was pre-announced.
One example: the old AC format was getting less than a 2 share, and we started planning a new format with research and staff hiring and training. We had confidentiality agreements in effect so the competition would not learn of what we were planning. One morning at about 11 AM we decided that we were ready. The last AC song played, and we switched to the new format. It debuted with over a 20 share.
Another example. We were doing Beautiful Music and were the leading FM in the market, but revenue for that format was limited. We kept the new format secret as we did our hiring, and even did a "fake" test format from midnight to 6 AM to make the competition think we were clueless. We shut down the old format at 6 PM on a Friday, waited about an hour and 40 minutes and played the first salsa song. That was like changing from Beautiful Music to Country. We had the whole staff there all weekend to calm down old listeners, some of whom were amazingly insulting towards the new music and the kind of "trashy" listeners we'd get. 24 days later, the first book had us at a 22.5 share.
My point is that generally format changes are not announced and that has been the case since Todd Storz reformatted KOWH as the first Top 40 station 60 years ago.