Yep, I agree with fester... Depends on broccoli

As has been mentioned much of the needed updates to OS3 are available from 3rd parties ... I don't think I would spend the money, unless it was a significant update... and then who knows how well (or even if) it would run on 68K Amiga's .....
What I Would pay for, though, is some kind of 'smart troubleshooting' program. Example, something that could automatically check for common dumb mistakes like having V. 3.67 of FBlit in C: , but an older vers. of FBlit.library in LIBS: ( D'oh!) Etc. Maybe even checking an entire SYS: for incorrect versions of files, known program incompatabilities.... OK, I know it may not even be feasible, and would certainly require huge amounts of time, effort, and broccoli ... but it would help a lot of people.....
Marcb: I bought 3.5 and 3.9 too.... but I don't have so much extra money these days ....