Thankfully the industry cares so little about preservation that they do not pursue private citizens who choose to play backups of their own software.

I openly use emulation but I also have physical copies or access to past downloads to backup from. I'm not against buying, say a PSP to play my old games but how long will Sony continue to support what is an ever-decreasing niche of customer?

The biggest grey area is digital abandonware. Is it unethical to download and play a game you did not pay for but is simultaneously no longer available for sale anywhere due to expired licences, company liquidation or (sadly) the demise of the creators?

The law needs to be subtley changed to make it legal (or not illegal) to play backups (read: copies) of digital purchases you legaly obtained through creator recompense. But also to make it not illegal to play copies of software that is no longer for sale on any platform after a period of X years.