Today, I realized that a "recommendation" tag exists. As the tag itself suggests "opinion-based question", should we discourage its use?
Different communities in SE take different stances on this matter. Recommendations aren't neccessarily a bad thing: see the successful site Software Recommendations.
Personally, I do think well asked recommendation questions can be fine, e.g.: What product works well for cleaning [specific thing]?.
Given we certainly don't have a problem with too many recommendation questions, I would just...not bother about this just now. If there are specific questions you think are a bad fit then by all means highlight them but making general decisions like this is too much rule-lawyering for where we are now.