> For someone using consumer technology on a consumer laptop
Mounting an SMB share on a Synology NAS to use as a Time Machine backup target is not what most users would consider "consumer technology."
That’s definitely in the range of what consumers do these days.
The consumer NAS business is large. These are popular items with average consumers who understand the importance of backups.
It’s reasonable to expect it to work properly.
To the contrary. Time Machine is for consumers. Most people use it either with an external hard drive (good for iMacs that stay in one place) or a NAS (good for MacBooks). Apple even sold the AirPort Time Capsule at one point. Since that was discontinued, Synology NAS is the main consumer-friendly alternative. It comes with dedicated Time Machine support. It's supposed to be easy setup and forget. That's the whole point of using Synology instead of alternatives that require more technical expertise, that aren't designed for Time Machine support straight out of the box.