First off, the smartphone industry is saturated as is. Anyone who ever wanted an iPhone already owns one or multiple ones. Then sold them off. The luster of owning an iPhone died out years ago. People are hanging onto their phones longer because the specs and each mobile platform is mature enough to use longer than say five years ago.
Secondly, flagships generate the most profits. Not midrangers or budget phones. If Apple wants a race to the bottom, they would need to license iOS to other manufacturers the way Microsoft did to Windows and make a lucrative cut from each OEM using iOS. Apple will not sabotage their profits just by slashing prices on their flagships. Apple goes for profits, not volume sales like what Google shoots for with Android to generate more web traffic and sell more ads.
I don't need to keep regurgitating what I already said with Apple and their future. Same ol', same ol'. Nobody stays on top forever. If it is truly that serious, okay. *shrugs* Every company goes through it from IBM to Sony. Apple went through it worse in the mid-90's. Only continents keeping iPhone afloat is North America and Europe. But Asia has 60% of the world population. You don't respect China, India, and Indonesia (#1, #2, #4 in population) enough for iPhone sales to grow considerably, expect consequences.
Apple should license iOS to other OEM's. This can drive hardware prices down for any non-Apple iOS devices. Now if the OEM changes the hardware configuration too much, tough luck on software updates. Real iPhones would then be treat like Google Nexus devices with the fastest updates. Apple can maintain selling their iPhones for higher profits while licensing iOS to other manufacturers would help saturate the Apple mobile platform in poorer but more populated countries .
At some point, all industries get saturated enough. But Apple needs other manufacturers to saturate iOS even more in countries like China, India, and Indonesia where price matters. BTW, if that happens to be iPhone Girl, at least someone has shown her loyalty working to assemble iPhones for us and being paid for very little. That's eight plus years of loyalty working under Foxconn. My loyalty dealing with all-Apple/all the time, burnt out three years ago.