@@aplotholesfiller8827 if you look at the Manga, there's more and more signs that he cares as the plot goes on. Even if Ataru's a hard-headed ass most of the time.
I wish that they would make more OVAs or even a film in this modern Age. But at the same time if you listen to Toshio Furukawa doing Ataru's voice again recently like in that Rumic reunion special in 2019 you could tell it's certainly aged while, funny enough, Fumi Hirano's Lum voice still sounds good haha Still though, it would be fun to see our favorite characters make a come back
I find it incredible that fumi can still do lums voice. Almost as if a reboot or just extra ova or film is possible, and it can actually happen. 40 YEARS LATER!!!