Car crash reading from a contemporary music ignoramous

I don't know how it happened, or when, but it did, and I'm about to shock you.

In school I was, like now, a slightly eccentric very normal person, but with the aid of older siblings I was at the heart of very cool music; fell into the grunge scene in the early 90s like the rest of the world (secretly bought Kerrang on occasion); dabbled in dance; followed Blur in the Indie civil war; stepped over to R&B at the turn of the millenium and then committed music suicide, without even realising it.

To illustrate my point. On the main stage of the festival line-up above there are 29 acts. I've heard of 9 of the bands and can name a song by two of the bands - Razorlight and the Chillis. I am totally clueless. When NTL replaced MTV with Channel 6 a year or 2 back I didn't bother retuning in MTV, well that's nothing really to do with music because they never played any anyway. I mostly buy old CDs by old artists, Bowie, Van. I'm building up my used-to-have-on-record collection. Even with classical music I haven't listened to anything new in ages. I watch retro anything on you-tube. I casually pick up the latest pop on radio but couldn't name any artist; the only ones I know of are those that saturate tabloid media . I've bought the odd new artist over the last few years but nothing that I got seriously into. I only realised how bad it was last week when my siblings were talking music and it was one big series of planes flying over my head. I used to know everything about all types of music without even trying, and now I know zilch and wouldn't know where to start to get back to general knowledge level. Ah well, ignorance is bliss and all that.