DVDStyler is not a bad program (once you've navigated the minefield of crapware add-ons successfully). It gives a fairly good choice of DVD menu options.
I disagree about the viability of DVD-video. Many people still use it as their primary means of watching movies. With a good upscaling tv or player, the quality isn't bad at all on a 1080p set, which is the highest resolution on the vast majority of HD tv sets.
Where DVDStyler is less impressive is its format conversions. I'd much prefer to use AVStoDVD and the HCenc encoder.