Sony depends on a consumer electronics business where the margins are thin. They try to command a premium but most other brands are more heavily discounted. Just look at the flagship OLED TV pricing from Sony vs. Samsung and LG.
Their media business is feast or famine. They depend on hits like most other movie studies. One year they could have a big Spiderman release and then nothing until maybe a Spideman sequel. They've had other big franchises but they're nothing compared to Disney.
Playstation was the main source of their profits for years. They're more diversified than Nintendo but they have almost as much dependency on gaming for profits.
You might want to look again, while PlayStation has had larger margins than their other divisions, historically it was only occasionally their highest source of profits, but obviously never revenue.
Just pulling out a couple random FY from Sony's site. Keep in mind it was the Game division back then becaue SOE was quite profitable and games like EverQuest were raking in consistent large profits for the division.
- FY 1997
- Operating income 370.3 trillion yen
- Electronics was 52.0 trillion yen
- Game was 45.2 trillion yen
- FY 1998
- Operating income 520.2 trillion yen
- Electronics was 314.5 trillion yen
- Game was 116.9 trillion yen.
- FY1999.
- Operating income 351.1 trillion yen
- Electronics was 129.9 trillion yen
- Game was 136.5 trillion yen (EverQuest released to the public this year).
- FY2000.
- Operating income 240.6 trillion yen
- Electronics was 118.6 trillion yen
- Game was 77.4 trillion yen.
Not going to go in depth on more, but from 2001 to 2005
- Electronics: +247 trillion, -8 trillion, +41 trillion, -34 trillion, -31 trillion
- Game: -51 trillion, +82 trillion, +113 trillion, +43.2 trillion (both Pictures and Financial were higher), +8.7 trillion (Pictures, Financial and Others were higher)
So, prior to 2005, their various division doing well from year to year meant they could easily absorb any one or even 2 divisions doing badly.
Luckily for Sony, from 2005 to 2008, Electronics recovered heavily (+160.5 trillion in 2007 and +356 trillion in 2008) so Sony could easily absorb the losses generated by PS3.
From 2009, their FY reports start to get a little weird with division reorganization. Unfortunately, that's also when the shit hit the fan for Sony and suddenly multiple divisions were doing badly. Only Pictures, Music and Disc manufacturing were profitable in FY 2009 and those combined still generated less in total profits than just the PS3 by itself generated in losses. But PS3 wasn't even the largest loss generator, that went to electronics (TV, cameras and phone in particular).
So, at no point was Sony really dependent on PlayStation any more or less than they were on any other division, at least up until PS4. I've got to get back to doing something constructive in RL now, so I'll leave it for someone else to look at FY financial reports from 2013 on.
Regards,
SB