If a mainboard fails you replace it and get back up (with downtime), if an SSD fails you lost your data. If you care about your data put some redundancy in it.

If a mainboard fails you replace it and get back up (with downtime), if an SSD fails you lost your data. If you care about your data put some redundancy in it. Even for the case that a motherboard fails having redundancy will help with the downtime, your software needs to be able to handle failover situations and that gets hard but sometimes worth it.