To my knowledge, besides the newest updates not necessarily being as stable, but also, other softwares that interact with it would need time to adapt themselves to be sure they’re as compatible as they were before. In a situation of constant updates, other software would always be on a situation of catching up, whereas updates that take a bit longer to land allow “for the dust to set down”.
Afaik most such Reddit alternatives support RSS feeds, so a RSS reader could be an option.