Infrastructure & system maintenance:
- Server and environment maintenance (a one-time thing when we take on the project)
- SSL certificate monitoring and updates
- PHP and system updates (where stable and compatible)
- Database and software updates
- Cache management (where supported by the hosting environment, e.g. OPCache, Redis, object cache)
- CMS core updates
- Plugin and theme updates (based on stability and urgency)
- Post-update compatibility checks