So as of now smolBSD can start with:
- regular NetBSD init(8)
- runit https://github.com/NetBSDfr/smolBSD/tree/main/service/runbsd
- dinit https://github.com/NetBSDfr/smolBSD/tree/main/service/systembsd
- nitro https://github.com/NetBSDfr/smolBSD/tree/main/service/nitro
Of the non-native alternatives, the latter has my preference, cleaner and slicker IMHO.