I basically did that for a while. I've never had much of a following, and since it's a hobby, not something I monetized, it was an easy thing to do. Eventually, though, I stopped posting on Insta entirely and went to Pixelfed exclusively. I kept my account, since like you, I have friends and family who are there and will never move away from it.
Turning this into a mass movement won't be simple. Most people don't think all that deeply about the implications of using a Meta product. They go where their friends or favorite celebrities are. If you could get someone with a huge following to make the switch, you might see some momentum.
I teach at the university level and can confirm. A while back, it was 4ºF/-15ºC, and I saw someone dressed like this. I had about 4 layers on and was still cold.
I basically did that for a while. I've never had much of a following, and since it's a hobby, not something I monetized, it was an easy thing to do. Eventually, though, I stopped posting on Insta entirely and went to Pixelfed exclusively. I kept my account, since like you, I have friends and family who are there and will never move away from it.
Turning this into a mass movement won't be simple. Most people don't think all that deeply about the implications of using a Meta product. They go where their friends or favorite celebrities are. If you could get someone with a huge following to make the switch, you might see some momentum.