HP-15c: Why so popular?

[Dave Britten]

(11-04-2023 10:08 PM)Steve Simpkin Wrote:  

(11-04-2023 09:47 PM)nickapos Wrote:  Yeah of course I know that 41c is expandable, but I did not realise that 15c was so feature full, and in general ahead of its time when it was released.

I had forgotten that the TI-58/59 had so much of the HP-15C functionality built-in (with the included "Master Library Module ML-01") when it came out 1977, 5 years prior to the HP-15C.
https://www.hpmuseum.org/forum/thread-20...#pid179541

It's a shame the TI-66 didn't retain module support, or at least have the Master Library Module built in. It could have been a viable alternative (I wouldn't go as far as to say competitor) to the 15C or even the 41C to an extent.