@miksuh
Quote:

miksuh wrote: Even if there would be new UI library I don't understand how it would change anything. Why it would not be AmigaOS anymore? MUI and Reaction are not original AmigaOS UI-libraries either.

Actually BOOPSI is an Intuition extension so, in fact, all BOOPSI classes are extensions of the AmigaOS. Both MUI and ClassAct/ReAct use BOOPSI classes internally, however only the latter uses the file format that Commodore outlined in their documentation.