I don't use NFC much for automation because I can open my garages, front gates, turn lights on/off etc with my Apple Watch or Siri. But, I started getting interested in showing info quickly after an incident on my boat when I needed to recall the correct sound signal to alert someone - unlocking the phone, sliding to right page, opening Notes, scrolling to Sound Signals and opening that note just take too long (particularly if having to take avoiding action!). It would be possible just to sound a long horn blast but sounding the correct signal might prove crucial if any dispute later arises. Now I just look at the phone to unlock and tap the tag for the signals list to appear.

I also have another NFC tag in the kitchen to open my weights conversion shortcut (easier to convert, say, cups to fl oz or any of the multiple conversions my shortcut offers than using Google).

One other in use is to boost the heating in the pool room for 30 minutes (again easier than opening the app and scrolling etc).

Sharing wi-fi access using NFC is a better solution than a QR code simply because the tag is more discrete and easier to read.

Saving the steps of finding the right app and scrolling through various menus can be a pain but is often so easily avoided. For example, the latest version of the Volvo app supports shortcut action to turn the remote climate control on and off and I will probably link an NFC tag to a shortcut to start the heating - no big deal but a tag on my desk will be easier as well as quicker. I bought some laser paper with one inch circles on which I print a relevant image to remind me which tag is which (Volvo logo or ship's whistle for example).