1. Companies cannot be lazy if they do not exist anymore. 2. Companies may not care to update software if it gives no revenue anymore. That is not lazy, it is

1. Companies cannot be lazy if they do not exist anymore. 2. Companies may not care to update software if it gives no revenue anymore. That is not lazy, it is called for-profit. Specially publicly-traded ones that do not care a single bit for the customer. 3. It may not be possible to move to 64-bit without a major rewrite. 4. It may not be possible because dependencies are not 64-bit. 5. Not everyone uses a major engine (I guess you are talking games here?). 6. Even if they do, updating is never trivial and is definitely expensive, specially for games. See reasons 1-4 as well. In short: no, it is not possible for a myriad reasons. Killing 32-bit support is a very bad move for customers.