Mapping landcover with multipolygons

I came across this video:

In it a mapper is showing how to map landcover with only multipolygons. That way, lines aren’t duplicated, and geometry is in a way clean.

I found this video because a mapper in my country got inspired by it and mapped an area in this way.

For me, it looks like bad practice, because mapper newcomers don’t know about relations, and they will be too scared to touch anything in that area. Or if they aren’t scared, they will definitely break everything they touch.

But on the other hand, it is clean mapping, and in their words, easier to maintain.

So should we look at this as mapping preference that should be respected, or should we look at this as bad practice that we should try to communicate with the user? Maybe I’m way off, and this is the new way to map landcover.

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