Rather than regulating features, I'd start with a dependency list.
So a smart plug might have a list saying:
- Functionality requires 2.4GHz WiFi, Internet access, access to whatever.vendor.com, and a vendor.com account.
- Provisioning requires the above plus BLE and Vendor's app.
A smart washing machine might be more complex:
- Express wash requires nothing special.
- Regular wash requires 2.4GHz WiFi, Internet access, access to whatever.vendor.com, and a vendor.com account.
- Heavy Duty wash requires the above plus a vendor-supplied detergent cartridge.
So a smart plug might have a list saying:
- Functionality requires 2.4GHz WiFi, Internet access, access to whatever.vendor.com, and a vendor.com account.
- Provisioning requires the above plus BLE and Vendor's app.
A smart washing machine might be more complex:
- Express wash requires nothing special.
- Regular wash requires 2.4GHz WiFi, Internet access, access to whatever.vendor.com, and a vendor.com account.
- Heavy Duty wash requires the above plus a vendor-supplied detergent cartridge.