Not necessary, perhaps, but still advisable.
Yes, ballet is still practiced today.
yes, book burning is still practiced today
is share cropping legal in the US
I would not say it is not necessary, because it is - just not required by United States law. You still need it for FIFO rotation. Frozen foods do deteriorate, but not at the rate of their refrigerated kin.
church
Yes, polygamy is still practiced in the United States by some groups of people, but not with legal consent.
Although segregation was illegal, it was still practiced. Northern cities went by custom not by laws.
yes
YES!!
yes.
yes
It is still practiced at temples in China and Taiwan.