Some companies foster cordial relationships with their partners by staying strictly in their lane.

For example, ARM licenses CPU core designs to chip manufacturers, but they don't make their own chips, as doing so would turn their customers into their competitors.

Businesses like contract manufacturers are similar - Foxconn wouldn't start making their own smartphone.

Of course, not every company takes that approach.

>Some companies foster cordial relationships with their partners by staying strictly in their lane.

That happens to be ARM's business model at the moment. It isn't guaranteed to be their model tomorrow, nor are they doing it be friends with partners.

Not that it really impacts your point, but Foxconn do make consumer products: RAM modules and motherboards.