I had an A310 and loved it
I am now worried that things I saw as new are museum pieces, that's making me feel old.
I recall cutting my teeth on the RISC assembler and wondering naively why this simple approach wasn't common across other processors at the time. Indeed I occasionally find this thought resurfacing even now...
The BBC basic on the Archimedes had been upgraded too and included lots of extra commands. My foray in to counting degrees with COS and SIN to draw shapes was replaced with the command CIRCLE. My nerdiness wasted from that point.
And yes, the OS and GUI were very good indeed, particularly for the time. Yes there were some things we are now used to that hadn't been thought of but it has been a long time before other GUI interfaces came even close. The mindset behind it was the best asset, not the specific features (or lack of).
Yes, it may not have become an industry standard, but it was a very well designed and executed bit of kit for its time, and I still miss it.