Got this gem back from support.
Hello from Amazon selling partner support,
Thank you for contacting us.
I understand your query that is regarding the character limit of title.
I am sorry for the inconvenience caused to you.
However, please understand that Amazon has a huge catalog of products from around the world. Consumers rely an Amazon’s site search to find those products. But it doesn’t mean they will find the best products. Your product may have the best quality, but your competitors will generate more sales if they appear higher in the listing of similar items.
Amazon allows 50 characters in most product titles. Some categories, however, allow up to 200 characters. In its search results, Amazon shows roughly 50 characters in title tags. Thus Amazon’s 50-character limit is enough to ensure a good title, using keywords strategically.
So, I suggest you to have The more detail you add in the title area, using critical keywords, the higher the chances of your product being viewed by potential customers.
Not sure what the last sentence is supposed to convey.