The Sony of 2019 is, effectively, an entertainment media and camera company that happens to still make a bunch of hardware.
Music on the Move: Sony's Walkman Turns 40
The Sony Walkman at 40 shows what's wrong with the company, walkman
The best Sony Walkmans ever: the players that made history
Sony releases a Walkman for its 40th anniversary
Sony Walkman Z review: Sony Walkman Z - CNET
SONY Celebrate Walkman's 40th Anniversary with Epic Exhibition
The Sony Walkman at 40 shows what's wrong with the company
Sony goes for gold with latest Signature Series digital audio player
Sony Walkman WM-FX40 decked out (minus Bluetooth, that'll be next) : r/cassetteculture
Before Apple iPhone, iPod, Sony Walkman made music portable
Sony's New Walkmans: What do they still have to offer?