You can define AGI however you want I suppose, but I would consider it achieved when AI can achieve at least about median human performance on all cognitive tasks. Obviously computers are useful well before this point, but it is clearly meaningful line in the sand, useful enough to merit having a dedicated name like "AGI". Constructed tasks like ARC-AGI simply quantify what everyone can already see, which is that current models cannot be used as a drop-in replacement for humans in most cases.

To me, superintelligence means specifically either dominating us in our highest intellectual accomplishments, i.e. math, science, philosophy or literally dominating us via subordinating or eliminating humans. Neither of these things have happened at all.