One app to install on any device, any OS, including Linux, and all my messages appear, SMS included. What's not to love?
Why don't you use a password manager in 2023 instead of being forced to remember things?
Here it is: https://github.com/spantaleev/matrix-docker-ansible-deploy
I am not bothered by running The Lounge + ZNC and having to use Matrix for everything else.
EDIT: I don't like this push for Matrix everywhere and essentially only having Matrix as the means of contact for open source projects. I installed Dendrite (lightweight golang homeserver) on my cheap VPS and I realized that federation is a big no-no for me, Matrix uses a LOT of resources for federation.
You could argue the same thing about their Facebook Page, Twitter, LinkedIn, Reddit, YouTube, VK and Instagram.
There's a reason that some FOSS projects succeed whilst others fail. They live and die by their communities.