It is probably no 'all' things amiga in existance. But it is surely a substantial lot.
But I do not find it disturbing to all be on a few dvd's. Storage capacities are advancing rapidly. The software devoloped for amiga was mainly carried by DD 3.5" disks. Since classic amiga software development came to a standstill you can expect all things amiga to fit on one single data carrier in the future. Not disturbing, but progress.