The problem with the Amiga is a different one. UAE already supports savestates, and some of the runs on the (now inactive)
recordedamigagames.org were using some kind of tool assistance.
But most amiga games have some kind of copy protection. Usually invalid sectors on the disks that return different data each time they're read. So, game dumps come in two flavors:
* .adf images. They just store the data of reading each sector once, and will thus fail to boot copy protected games. Most games distributed by .adf are cracked, i.e. have the copy protection removed. Tasvideos.org does not accept run on modified games.
* .ipf images. This stores the results of reading the disk several times, but it's a proprietary, closed source format made by the
Software preservation society. As far as I know, it is not deterministic and cannot be used in a rerecording emulator. Not to mention that we couldn't claim that everyone dumped the original disks themselves: the tool to dump disks in this format isn't public.
Thus, while it should be possible to add rerecording to UAE, the list of games we could actually TAS would be minimal.