

Solo Self-Found (SSF) is a thing in Path of exile and usually creating a standalone version like this requires some modifications to the game anyways for it to even run. For example developers behind Warhammer 40000: Inquisitor patched their game so that it can be played offline and even allows players to access old seasonal content (allows picking season when creating new character).
Personally I’ve only ever played POE solo and I think the game holds very well against many premium ARPG titles. When the game reaches its EOL as live service it would be very wastefull for GGG to just drop the game instead of turning it in to a paid standalone title that people can buy and play for as long as they want.