In my country there are a lot of "cultural" Muslims, who do not pray or follow Islam correctly. But recently there has been a great change, Muslims, especially youth, are becoming practising left and right, alhamdulillah. Now, these people have 10/12/14 years of missed Salaah to make up, according to the majority of the early scholars. Doesn't this fall under hardship? It is a great burden and stress. This was probably never the case for Muslims to start praying properly in such massive scale, is there a new perspective of looking into this issue from the point of view of the maxim al darar yuzal?

Many Salafi scholars say that there is no Qadaa for purposely missed Salaah. They say that repentance is sufficient. Please see Shaykh Salih Al-Munajjid for details and evidence from the Hadith: http://islamqa.info/en/111783