HEIC faces a few struggles with adoption:
- It's patent encumbered.
- It's not free as in "free beer", someone has to pay for it.
- It's not free as in "free speech" - you can't use, modify, and distribute software or formats without restrictions due issue #1.
AV1 and AVIF don't have any of these issues –someone correct me if I'm wrong or missing something– so anyone is able to include/distribute the software and modify to their needs.
Bitwarden and Cryptpad. Both open source and self hostable, yet I pay for both. paying for open source is possible.