I dont think that Fosi will die for example ...
The definition of what is low-fi versus High-fi could had meaning when the public had not easy access to knowledge as nowadays...
Excellence of design at any price for any and each one needs is not compatible With expression borderline to marketing insults..
My system at 1000 bucks dont rival Jay high end product for sure but is more than very good and i dont need it at all any high end product , thanks to mechanical,electrical and acoustical basic controls and synergy and wise choice...
By the way my Sansui and My AKG K340 were top of the world product 35 years ago and it is enough for me especially because i was even able to improve them...
There is no low fi, mid-fi or high fi, for me only excellence at all price for all needs and acoustics knowledge and principle put at work or not ...
All these Lo-Fi brands will die with the Retailers that sell them.