What's the gist of your "personal experiences with Beeper"?

I've tried Exo and it worked fairly well for me. Combined my 7900 XTX, GTX 1070, and M2 MacBook Pro.

Is that enough resource to use as a VPN?

Passkeys work on whatever platforms your passkey is compatible with. I store mine in my BitWarden vault which works on web/PC/mobile just fine.

Pocket ID is an OpenID Connect provider (basically OAuth), so it depends on whichever apps you're using having support for that.

Home Assistant does not natively support OIDC, but there is a community project in active development which aims to add support.

Grafana Loki is very light on resources and simple to deploy in most cases.

Combine with Sigma detection rules (converted to LogQL queries using the Loki plugin) and you're off to the races.