We can't abolish it. That would be theft. A lot of people worked very hard based on the assumption that their work would be theirs and that they could monetize it.
It would be the greatest theft of human labor since slavery.
If we switch to a communist system with UBI, then that might be acceptable. Otherwise not. You can't arbitrarily abolish laws as soon as they become inconvenient to capital.
The post didn't say that it should happen in a single moment. It would likely take the form of heavily reducing the maximum duration across the board and then gradually decreasing it for anything new. For example, capping it entirely at 30 years and then reducing it by 1 year for all new works every year. It would then be abolished in 30 years.