Nope. They made great software, and not so good hardware. They went away because dot-com bubble burst and tech world cancelled orders of the hardware. Also, bad business decisions linking their success with sales of hardware, instead of support for software.

> "Sun is responsible" for the problem, said a project manager at a large European bank that was affected by it. The manager spoke on condition of anonymity. "Their architecture was fundamentally flawed because there was no ECC checking on the cache memory. This is something you get in even the lowliest Intel processor that costs a few dollars," he said in an e-mail message.

https://www.computerworld.com/article/2585204/sun-fixes-serv...