For the same reason that one might learn Lua to write a quick crank app for the play.date machine .. or write a synth plugin for Zynthian.
Alternative platforms are, for a passionate hacker/coder/software person, an extraordinary playground for creative development, both personal and product-wise.
All I'm saying is, sometimes it is great to shed the cruft of modern platform development, and have a look at how things could be done - alternatively - in a way that is nevertheless future-useful.
The constraints of developing an algorithm at great length in the Amiga environment, may then result in a value increase when you port the right bits elsewhere .. many a bit of C has led such a slippery life, you know...
Also, for great justice. We made Amiga, they fucked it up. But we can still pretend what it would've been like had it fared better. The main way one does this is by filling in any gaps in its software collection.