[defrost]

Original Sun hardware was rugged, operating mounted in truck beds running across corrugated roads rugged, optional full Faraday shielding for box, cables, and monitors tough. Really positive "never going to let you go" slotting of expansion cards into motherboard that resisted vibration issues. Fans that could go in a building HVAC.

That came at a cost and the market size of people that really really wanted / needed that field toughness was considerably smaller than the general office usage market.

[AnthonyMouse]

Because that's the market you can win when you're locked out of the mass market. But it's also not sustainable because then the mass market product will move up (Xeons based on x86) and you still can't move down with Microsoft blocking you.

Whereas if not for that, you could do both. Design a solid chip and then put dozens of them in a big iron cabinet for big money but also offer desktops with just one of them for prices that compete with Dell. Except that Dell's customers expect to open their existing Office documents and run their Windows API proprietary software and then won't buy from you.