Part of the Furniture
The smart switches we use each need to be removed and re-added to their app interface, along with HomeKit and Amazon Echo, to work. Those, too, need to be completely nuked in order to work properly when changing SSIDs. Then each device needs to be re-added to its respective group, automation routine, and scene since it's "new."
I assure you this process takes a minimum of 10 minutes per device (and more, depending on the smart home setup piece, and we have nearly two dozen of them). This represents only one class of the wifi components of our smart home. In all, 60+ devices connected in our home.
Your methodology may have been relevant 10 or more years ago; today, it's impractical.
You may be correct for your particular network environment. Possibly, you have too much going on for the expected output?
I haven't been doing this for 10 years yet.
Everything I suggest is what RMerlin and other members have previously stated to work for them in many scattered posts throughout the forums. I have merely consolidated that advice and added a few of my own tricks I've picked up in the few years since proving how well they work on many different networks.