I've never understood the mindset that newer, better games* make the older games they succeed less worth playing or otherwise obsolete. If it was good originally, it doesn't become less good just because someone made something better. I'm all for appreciating newer RPGs and all the stuff they bring to the table (run around a fantasy-land the size of the continental US? In gorgeous, video-card-straining 3D? Hell yeah, I'll take that!) But that doesn't (and shouldn't) make older stuff not fun anymore.
* Working with the assumption that "newer" = "better" where RPGs are concerned, which isn't always true, but may be here, I dunno.
Also, there are tons of shmups and platformers for the PC, going all the way back from the CGA days through the VGA gorgeousness of Jazz Jackrabbit to modern stuff like La-Mulana or the Touhou Project series. Maybe not as many as there were for the Amiga, but still plenty to choose from. And the newer stuff doesn't make the older stuff outdated there, either.
Anyway, that doesn't change the fact that the thread is specifically about recommendations for Amiga first-person RPGs on the Dungeon Master model, and it's rather baffling to come into the thread just to say that the games in question are outdated and people shouldn't bother with them.