OIAL had a shorter story and had less focus on the overall cast though (there were only like 4 LI's that had significant character focus - Lauren, Judie, Rebecca, and Carla - while the rest had way less screentime and character development...but even with that said, there's a lot of group dynamics that were missing there as opposed to what we have now with Eternum), not to mention the scope ain't that large (An abandoned hospital, a short trip to Japan, and a haunted mansion ain't got nothing on a whole-ass Cyberpunk server, 2 Medieval Fantasy servers, a Mystery server, a Casino server, and a Historical Server. And that's not counting the short trips on some servers in 0.3) so the (/does some mental quick math) 1 year and 9 month dev cycle is understandable.
Earlier guess was that this game was going to have 2 more years in its life (with the game ending around 0.12 or 0.13). But with the recent comments of a Patreon supporter on Itch...
...yeah if Caribdis squeezes 2-3 updates that are similar to 0.5 (less story-oriented and more downtime/character-building/harem-building focused) then sure, I can see it go up to 0.14 or even 0.15 (so that's one more extra year). Highly doubt it'll go beyond that unless the current pacing suddenly slows down in the next updates though...or dev pulls out all the stops and turns 0.16 into one hell of a finale as opposed to what he did in the final confrontation between MC and Astaroth in OIAL.