Questions like Will rubber pavers hold up against Wisconsin winters?, are basically asking for product reviews. Should these types of questions be considered on topic, even though the answers will likely only contain opinions and/or stories?
Tricky one this. It might be one of those cases where it depends on the quality of the answers, or the specific question being asked.
On one level it will, as you say, elicit opinions and anecdotes, which would tend to make the question "not constructive" at best as each is easily valid.
Where it might work is questions like the one you linked to. You should be able to answer this objectively by posting the temperature range the manufacturer guarantees the product will perform under.
Where is doesn't work is questions like "Is this drill any good?" as the answer is "it depends on what you are going to do with it".
I think we have to take these on a case by case basis.
"Will this type of product work in my situation" is generic enough that it's not a "too localized" question, and I think it is possible for answers to be factual instead of story/opinion based. For example, someone could point out that rubber becomes brittle at colder temperatures and can't be installed deep enough to prevent frost heaving.
To me, I feel like a better question would have been "which type of paver will result in the least maintenance in a cold climate" which is more similar to a tool selection question. But the generic product review question is still good enough for me. That said, if they ask about a specific product, I'd consider closing it as too localized.