Preserving digital culture is a legit issue. But it's about copyright laws, not about corporate mergers.
Apple have wiped vast numbers of early iPhone games from existence by having their walled garden and limited backward compatibility. Most early iPhone games, from the 32-bit pre-F2P era will never be played again. But nobody really cares about those.
Much bigger games have been lost too. Many MMOs, in particular, as nobody ever had access to the server-side code. And most modern console games have online components and risk becoming unplayable when the servers are turned off.
Classics from Infocom and Sierra can at least be preserved by enthusiasts, as physical copies still exist and individual fans can ignore the copyright question.
The digital preservation issue extends beyond games, too. We may be entering a future were even books, in their digital form, are frequently updated to fit present-day cultural sensitivities. And without physical copies, it may become impossible to reference the original text, or even know whether edits have occurred.