Have you done any blind testing against, for example, a $100-200 pair of headphones?
I disagree. Most headphones are really easy to drive, including many high end ones. And DIY builders are making perfectly good & cheap amps using parts that have been available for more than two decades now. Parts that used to make it in stereos and other off the self supermarket stuff.
I'm more than happy to plug my AKG K812 to laptops (such as a thinkpad T460s), android phones (such as LG G4, One Plus 6), portable media players (such as the Cowon D2). My Sennheiser HD650s, HD800s, and AKG K701s are generally plugged to external DACs and amps mainly because I use them at the desk (or with my music gear). But I've tried all of them on various consumer gear and many of them can deliver good sound. The Sennheisers, however, can be a little too quiet with some of the portable devices.
What the author of the linked story here is complaining about is the race to the absolutely garbage bottom (though it isn't nearly as bad for people with less sensitive phones).
Alas after an 'upgrade' to a pixel 3 after I crushed the first one against the deck while sailing, I had to buy a bluetooth dac and that doesn't seem to do as well.
I've tried a few different pairs and the pricepoint where sound quality becomes "good enough" seems to be somewhere around ~£35. If you want a microphone too, bump that up to ~£50.
My _purely anecdotal_ experience is that cheaper headphones tend to work well for pop music, likely because their reproduction range is bass heavy. Sadly the moment you want to add podcasts into the mix, the balance is off. Spoken word just sounds stuffy.
When I'm not on the move, you can pry my AKG K270 off my cold, dead hands.
I do see a difference between the branded ones I've used (mostly Panasonic and the Samsung AKG one that comes with phones) and the cheaper generic ones I've tried out here and there
There are some very crap ear buds around (e.g. Norwegian Air's freebie handout ones are quite possibly the worst things I have ever used), but I was pleasantly surprised by the sony ones. No relation - just a satisfied customer.
1 - https://www.sony.co.uk/electronics/in-ear-headphones/mdr-ex1...
I paid (a very reasonable) $2k for a set of reference headphones and a suitable amp/DAC to drive them.
I could have spent a lot more.
It is hard to drive a set of headphones with enough SQ to make them worthwhile.
You cannot plug a set of headphones into an Android phone and expect anything good to happen. And lots of DAPs suffer from software problems as well (lots of them are Android based...).
Getting good sound from a portable device, without software issues, is really only solved at the top end of the market ($700 - $4000).
It’s a bit easier if you want to use a computer as a source but far from cheap.