I asked if people chose iPhone for the blue bubbles elsewhere a couple days ago, and while there was some good discourse on that post, the blue bubbles definitely also came up as a reason.
In my experience, when people find out my texts are green, they oftentimes would rather switch to a different platform altogether like Instagram or just not text at all.
Is this actually a deal-breaker in friendships out there?
Matrix is a decentralized messenger. https://matrix.org/
Bridges are a way to integrate other messengers into matrix and communicate over it. Actually most big messengers are available, WhatsApp, telegram, signal, imessage, Facebook messenger. (Discord and slack, too.)