The Sinclair QL Forum

Quite simply the C64 was designed to be a powerful home computer, whereas the QL was cobbled together in an almost ad hoc manner, with the sole aim of being a cheap 'Business" computer. It was built in the usual Sinclair way, down to a price, no matter what the consequences. It wasn't marketed ...

The situation with the latest versions of the 'genuine' Amiga OS is... complicated. And litigious. However, AROS and MorphOS are both reverse engineered, built from the ground up without access to the original codebase. Aros 68K is slower than Amiga OS on the same hardware, but it's more extensible ...