>>719710776 (OP)
Why would they spend time and money developing a sequel when they can make money hand over fist re-releasing the same game 5 times? This is the problem with capitalism, it's innately greedy. It incentivizes companies to offer the least possible value for money they can get away with. It's about offering as little of a product or service as you can for the most amount of money and by its nature it will only get worse and worse over time, stifling creativity as time goes on and monopolizing wealth toward fewer and fewer people.
Thank God for devs like Sandfall who put the quality of their product first and place trust in their audience to compensate them, or like Kojima who already has more money than he could ever want and any new game he makes is guaranteed to print even more, giving him the freedom to do exactly what he wants.