It's the question of both though - sure, game preservation aspect is important but it would also be nice for the law to catch up to technology and decide whether companies should have the right to remove your ability to use the product you bought.

If the law would go through in the way envisioned by the campaign, games should be designed and developed in a way that releasing a patch/server software should be possible even for a company at the verge of closing. We're not talking about creating these releases at the last moment but baking their creation into the development process from the start.

At the end of the day all the possible solutions proposed by the campaign are just ideas to give lawmakers some kind of starting point. If this goes anywhere it'll be debated and decided upon by people with far more law and customer protection knowledge than anyone involved in the campaign itself. The important part right now is to bring the issue to someone willing to look into it.