You should always know your audience. The problem I feel is that some recommendations says something like "always make apps that work without javascript". If yo

You should always know your audience. The problem I feel is that some recommendations says something like "always make apps that work without javascript". If you know that about 99% of your users have javascript that may cost a lot for the last percentage. It is also diffrent for public service apps from authorities that people are required to use and a new product/service you want to sell but where there probably are or might be competition that does things differently.