While there is no success guarantees attached - from my long experience with Manjaro - user since 2016 - I can say I have had more issues with plain Arch than I ever had with Manjaro.
[HowTo] Updating Manjaro as safely as possible
[root tip] [How To] Update Manjaro the smart way
Issues usually comes from either one or a combination
- Custom packages (AUR)
- Nvidia
- Faulty hardware
Proactive maintenance
- make a habit of noting when you make configuration changes
- if you sync an application
- remove it if you don’t use it
- long forgotten apps may cause interference
- stay informed (Announcements threads)
- incidents on testing or unstable may be equally relevant when packages reach stable branch
- Comment #2 in the announcement thread informs of known issues