I was still very young (I'm 30) when VHS and Betamax polarized the market. I believe VHS won in that tug of war. It was a short-lived victory though. Movies in CDs flooded the market. Many VHS rental shops shifted to CD rentals, but that didn't help. CDs are a different and much cheaper medium. Many video rentals closed down.
That I see is the source of your fear.
Many Betamax players were rendered useless when the market got saturated with VHS. This happened over many years though.
The rise of CDs was different. VHS players were still being sold despite the rising popularity of CDs at that time. In some parts of the world, people still buy VHS.
Long post
Anyhow, keep your own pace in upgrading your gadgets. No need to buy the latest all the time. Only the manufacturers would profit from that