I think you're over-reacting.
Standard DVD writers are not becoming obsolete, it's just technology moving on.
Dual layer writers are not pureley for copying DVDs. The main plus is that you can record twice as much as what you could have recorded anyway.
The betamax/vhs thing is more similar to the +/- standards of DVD, there is a (small) chance of one of these going the betamax way.
If we wait for the new technology, we will never have anything.