Also, is hyn/multi-tenant the same as github.com/tenancy/multi-tenant?
If I was going to start a tenant-based SaaS today, which of these would I choose?
I'd be using the latest Laravel, which I think is 8.x.
Yes they're the same. Which one you choose is ultimately up to you as they're both still supported. Having said that, tenancy/tenancy is the successor to hyn/multi-tenant and is meant to be much more flexible and dev-friendly.