IIRC this procedure requires constant maintance by the owner to insure that the now unmovable claw does not grow too large or ‘circle’ totally around.
I work with one of the local cat shelters here. If you want to have a declawed cat - get one already declawed at the shelter - they get them all the time. A lot of the time declawing is modifying the cat to make up for the owners mistake in not spending enough time training or training incorrectly.
I have a cat that would NEVER put her claws out (actually I don’t know how she knows not to under some circumstances) on a person. This same cat might bring down several birds in a day so she knows how to use them.
Front declawing is better then dumping them back at the pound or shelter. If it’s the only way that you will keep your cat then fine. F & R is overkill and very dangerous for a cat. When attacked a cat will fight and try to escape, this is normally done with biting and front claws. If escape is not an option a cat will usually change tactics and while holding on with mouth and front paws (front claws help immensly here) will powerfully rake the attacker with the back. A F declaw can manage this manuver but a F & B declaw will still try but fail putting it in a very vonerable position. Also as pointed out having rear claws will usually allow rapid climbing of trees or whatever to allow escape.
Because of F declaws being able to still defend themselves when things get heated we can put fully clawed cats in with F declaws (in the cat colonies at the cat shelter) but fully declawed cats must be caged because if they are attacked they will mount an unsucessful defence that will just encourage the other cats to continue - not pretty.
Also declaws are more likley to be biters (from experence) and more likely to develope bad litterbox habits (from, well I.ve heard it over the years)