I can guarantee you that lost btc address will eventually be subject to forfeit much like an old bank account with no action gets grabbed.
An untouched btc address in terms of no funds ever removed will be considered lost .
The funds will be folded back into mining rewards for blocks.
To anyone that thinks I am wrong I simply laugh.
Zero reason not to do it. Say in 2059 all 2009 address must show some withdrawal or lost.
To those that say no privacy I say you are clueless.
To those that say it will be outvoted maybe in 2059 it will be outvoted but down the road say 2084 or 2109 it will be out voted.