That was my exact first computer with the CGA graphics, GEM Desktop, Locomotive Basic etc. All the software came in 4 360KB diskettes. The diskettes had each it's own beautiful color. There were 3 sample Basic programs that seemed to me quite advanced. One sample was a document management system. Another was a drawing program where you could draw with a mouse. Didn't know that GEM Desktop was made by Digital Reasearch. It was a very good windowing system. I believe it was based on MS-DOS. There was also a CP/M OS. So much software in only 1.2MB.

At 8mhz? I'd imagine it rivals at least the Pentium III

nit²: 2.2x as fast, or 2.2 times the speed; not 2.2x faster. same issue you pointed out.

using faster with x/times is just begging for misunderstandings

Just LLM it