I have actually been thinking about this specific topic quite frequently over the past few years, with an increasingly large amount of effort and funding being poured into Mobile games and MMOs that are going to be completely wiped from existence when their time comes despite the massive amount of financial investment and work put into them. Plenty of gacha games could easily be made into just straight visual novels, or MMOs turned into RPGs and sold for a flat price. I think that in the eyes of most companies investing the effort into it isn't worth it compared to a new microtransaction cash cow.