Not to mention, what prevents a future release of the feature either turning the percentage to 0% or removing the hold-back entirely?
Imo thats like the main issue here. Google tweaks chromium changing a single number and everything goes to shit. This proposal is a trojan horse!
If landlords don't want to hemorrhage money by not having a paying tenant on their land, they will lower their prices. The problem with land is that we can't create more of it. It is not a commodity supply can be artificially restricted to the detriment of the rest of society. If land holders constantly lost money for not having their land generate wealth, there would be no incentive to artificially reduce supply.