No, this is unneeded. If there isn't enough detail to make a clear answer, the question shouldn't be closed as off topic for being a product recommendation, it should be closed as either "primarily opinion based" if they scope their situation well, but there is no supportable subjective answer (see good subjective/bad subjective) or as "unclear what you are asking" if they don't provide enough detail to answer the question meaningfully.

Off-topic for reasons of product recommendation only really applies when the question IS well scoped, however the answer would not remain valid over time.

Though as mattdm did point out in comments, I suppose it is a little too definitive as some product recommendations may not change quickly. Perhaps changing to this would be good:

Questions seeking product or service recommendations are off-topic in the event they are likely to become obsolete quickly. It is better to describe your situation and the specific problem you're trying to solve so that guidance can be given that will work long term.

No, this is unneeded. If there isn't enough detail to make a clear answer, the question shouldn't be closed as off topic for being a product recommendation, it should be closed as either "primarily opinion based" if they scope their situation well, but there is no supportable subjective answer (see good subjective/bad subjective) or as "unclear what you are asking" if they don't provide enough detail to answer the question meaningfully.

Off-topic for reasons of product recommendation only really applies when the question IS well scoped, however the answer would not remain valid over time.

Though as mattdm did point out in comments, I suppose it is a little too definitive as some product recommendations may not change quickly. Perhaps changing to this would be good:

Questions seeking product or service recommendations are generally off-topic as they may become obsolete quickly. It is better to describe your situation and the specific problem you're trying to solve so that guidance can be given that will work long term or at least narrowing it down to a few specific products to compare.

My only concern with such a change would be that it could invite debate about if something is really "likely to change quickly." That's kind of why I like the current standard of closing any "What product should I use for A?" but allowing questions like "Which product of x, y, z is better for A?". It is possible the former may change tomorrow, but nothing is going to change which of x, y and z is better for the situation.

No, this is unneeded. If there isn't enough detail to make a clear answer, the question shouldn't be closed as off topic for being a product recommendation, it should be closed as either "primarily opinion based" if they scope their situation well, but there is no supportable subjective answer (see good subjective/bad subjective) or as "unclear what you are asking" if they don't provide enough detail to answer the question meaningfully.

Off-topic for reasons of product recommendation only really applies when the question IS well scoped, however the answer would not remain valid over time.

No, this is unneeded. If there isn't enough detail to make a clear answer, the question shouldn't be closed as off topic for being a product recommendation, it should be closed as either "primarily opinion based" if they scope their situation well, but there is no supportable subjective answer (see good subjective/bad subjective) or as "unclear what you are asking" if they don't provide enough detail to answer the question meaningfully.

Off-topic for reasons of product recommendation only really applies when the question IS well scoped, however the answer would not remain valid over time.

Though as mattdm did point out in comments, I suppose it is a little too definitive as some product recommendations may not change quickly. Perhaps changing to this would be good:

Questions seeking product or service recommendations are off-topic in the event they are likely to become obsolete quickly. It is better to describe your situation and the specific problem you're trying to solve so that guidance can be given that will work long term.