Siloing and URL Taxonomy

Hi there,
Quick question about URL classification.
I have 3 main categories for my website: products/markets/application so I am wondering if I need to make category name appears in my URL (as this is not a keywords but only common name like "products", "market", etc.

So what is the best option:

www.example.com/products/phone/iphone
www.example.com/market/electronic

or

www.example.com/phone/iphone
www.example.com/electronic

since when did "subdirectores" gave ANY benefit other than additional keyword-stuffing penalties?

even 1998 sub-dirs was "bullshit-seo" if you aint got 100s pages behind it.

Flat URL structure is the game these days. I have noticed that in the last 6 months that there is not as large of a penalty as there was from 2012+, but the game is the same. Flat is better right now.

Thanks but siloing technic is still the game in 2017. And organizing URLs with folders seems to help the ranking. I've seen many ecommerce websites that use this SEO approach.