The term phablet has been pretty much obsolete since 2015 or so. Better accept that we're not going back.

All Android devices and all but one iPhones are phablets. Come at me.

All Smartphones are PDAs

Well, the phone manufacturers are not entitled into a sale for a product people do not want. They better accept those declines.

The people have spoken they want big phones, I assure you that's not the reason they're not upgrading. Apple tried making a small phone, and there just wasn't enough interest to justify it. The trade offs, mainly battery life, just aren't worth the smaller screen, not to mention most OSs and apps are made with larger screens in mind.