Zigbee/Z-Wave/Thread are all meant for sensors. WiFi not so much. It’s easier to host more sensors on the purpose-built network types. Special consideration for Z-Wave since it uses different frequency than WiFi, which the others do not.
WiFi and batteries don’t really go together, which also puts a real limit on what you can do there.
Other fediverse platforms have had it for awhile. Not sure why so many feel so stuck with Mastodon. There are alternatives.