Recording may be OK, but reading ???
I have a multitude of Windows and Linux-burnt DVD-R that have iso9660 file system. Although one person told it was non-standard to use multisession on this filesystem, and, in fact, to use iso9660 on a DVD, Ubuntu (did Linux done the same?) has recently implemented the ability to read such multisession DVD-R in iso9660.
As far as Linux programmers are concerned, I can't believe they've allowed a non-standard solution to be in their products, so why do the "Most advanced OS in the world" still lacks this essential feature?