I understand your frustration - and I do agree, I had no idea it was removed, the same with microphones.
But for the 18 months I’ve had Homey, this is the first time I’ve ever used NFC - so I also see the point of removing it, if it makes it cheaper to produce and might increase range of other antennas.
An external NFC reader makes more sense for activating alarms, presence etc. as you can place it where you want it.
I wouldn’t put NFC in the same category as Z-wave, Zigbee etc, as they have a very useful range, while Homey’s NFC reader works for a distanse of a few millimeters on the top of it.
An external NFC reader is interesting because you could f.ex have a holder for a tag where you place your keys, and would automatically react when you pick up your keys and leave.
We’re talking approx $2 for NFC reader and $3 for Wemos D1 Mini