I've found one business model that can help this problem from a AAA developer. It's what CA and Sega did with their Total War Warhammer games. When game 2 came out and through a free DLC, everyone who had purchased game 1 and its DLC could use those in game 2 (with updated game 2 mechanics). Same with game 3, which now includes all of games 1 and 2. So, while game 1 is now technically abandoned, you can still play it using the later games. And, presuming they keep supporting the last version of their game, it means your experience will never become truly abandoned. It's not a perfect system, but I'd say it's something that helps both sides. The developer/publisher can have every customer migrate to their latest title while people would not lose anything they love from previous games (they even went back and retroactively updated game 1 DLC factions to help them keep up with game 2 and will probably do it for game 3 as well).